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revision 602, Thu Apr 6 05:31:24 2000 UTC revision 657, Fri Jun 9 05:20:54 2000 UTC
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13  Description:  Description:
14  ----------------------------------------------------------------------  ----------------------------------------------------------------------
15  Name: Allen Leung  Name: Allen Leung
16    Date: 2000/06/09 01:25:00
17    Tag: leunga-20000609-various
18    
19    None of these things should affect normal SML/NJ operations
20    
21    1. Peephole improvements provided by Fermin (c--)
22    2. New annotation DEFUSE for adding extra dependence (moby)
23    3. New X86 LOCK instructions (moby)
24    4. New machine description language for reservation tables (scheduling)
25    5. Fixes to various optimization/analysis modules (branch chaining, dominator
26       trees etc.)
27    6. I've changed the CM files so that they can work with versions
28       110.0.6, 110.25 and 110.28
29    
30    ----------------------------------------------------------------------
31    Name: Matthias Blume
32    Date: 2000/06/09 12:40:00
33    Tag: blume-20000609-log
34    Description:
35    
36    - Removed all(?) remaining RCS Log entries from sources.
37    
38    - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
39      anchored paths).
40    
41    ----------------------------------------------------------------------
42    Name: Matthias Blume
43    Date: 2000/06/07 17:00:00 JST
44    Tag: blume-20000607-no-implicit-anchors
45    Description:
46    
47    1. This update changes the default setting for
48    CM.Control.implicit_anchors from true to false.  This means that
49    implicit anchors are no longer permitted by default.  I also tried to
50    make sure that nothing else still relies on implicit anchors.
51    (This is the next step on the schedule towards a CM that does not even
52    have the notion of implicit anchors anymore.)
53    
54    2. More CM manual updates.
55    
56    3. I managed to track down and fix the pickling bug I mentioned last
57    time.  Because of the previously existing workaround, this entails no
58    immediate practical changes.
59    
60    ----------------------------------------------------------------------
61    Name: Matthias Blume
62    Date: 2000/06/06 11:15:00 JST
63    Tag: blume-20000606-lazierpickle
64    Description:
65    
66    !!!! NEW BOOT FILES !!!!
67    
68    * The main purpose of this update is to make library pickles lazier in
69    order to reduce the initial space penalty for autoloading a library.
70    As a result, it is now possible to have $smlnj/compiler.cm
71    pre-registered.  This should take care of the many complaints or
72    inquiries about missing structure Compiler.  This required changes to
73    CM's internal data structures and small tweaks to some algorithms.
74    
75    As a neat additional effect, it is no longer necessary (for the sake
76    of lean heap image files) to distinguish between a "minimal" CM and a
77    "full" CM.  Now, there is only one CM (i.e., the "full" version:
78    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
79    interactive top level. ($smlnj/cm/minimal.cm is gone.)
80    
81    To make the life of compiler-hackers easier, "makeml" now also
82    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
83    words, after you bootstrap a new sml for the first time, you will not
84    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
85    around you will still have to do it, though.)
86    
87    * A second change consists of major updates to the CM manual.  There
88    are now several appendices with summary information and also a full
89    specification of the CM description file syntax.
90    
91    * In directory src/system I added the script "allcross".  This script
92    invokes sml and cross-compiles the compiler for all supported
93    architectures.  (Useful when providing a new set of boot files.)
94    
95    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
96    added a small tweak to pickle-util.sml to work around this problem,
97    but it is not a proper fix yet.  I will investigate further.  (The
98    effect of the bug was an inflation of library pickle size.)
99    
100    * Version number increased to 110.28.1 (to avoid compatibility problems).
101    
102    ----------------------------------------------------------------------
103    Name: Allen Leung
104    Date: 2000/05/25 17:28 EDT
105    Tag: leunga-20000525-ra
106    Description:
107    
108      Fixed a bug in freezing phase of the register allocator.
109    
110    ----------------------------------------------------------------------
111    Name: Allen Leung
112    Date: 2000/05/15 22:53 EDT
113    Tag: leunga-20000515-alpha-x86-ra
114    Description:
115    
116      1. Alpha
117    
118          Slight cleanup.  Removed the instruction SGNXL
119    
120      2. X86
121    
122          Added the following instructions to the instruction set:
123    
124            ROLx, RORx,
125            BTx, BTSx, BTLx, BTRx,
126            XCHGx, and variants with the LOCK prefix
127    
128      3. Register Allocation
129    
130          The module ra-rewrite-with-renaming has been improved.
131    
132      These have no effect on SML/NJ.
133    
134    ----------------------------------------------------------------------
135    Name: Matthias Blume
136    Date: 2000/05/15 16:20:00 JST
137    Tag: blume-20000515-lightrebuild
138    Description:
139    
140    1. I added an alternative to "-rebuild" to "makeml".  The difference is
141       that prior to calling CMB.make' the CM-variable "LIGHT" will be
142       defined.  In effect, the command will not build any cross-compiler
143       backends and therefore finish more quickly.
144    
145       The "fixpt" script also takes a "-light" switch to be able to use
146       this new facility while compiling for a fixpoint.
147    
148    2. I replaced all mentions of anchored paths in group owner specifications
149       with simple relative paths (usually starting with "..").
150       The rationale is that a library's internal workings should not be
151       compromised by the lack of some anchor.  (An anchor is necessary
152       for someone who wants to refer to the library by an anchored path,
153       but it should not be necessary to build the same library in the first
154       place.)
155    
156    3. I changed the way CM's tool mechanism determines the shell command
157       string used for things like ml-yacc etc. so that it does not break
158       when CM.Control.implicit_anchors is turned off.
159    
160    ----------------------------------------------------------------------
161    Name: Matthias Blume
162    Date: 2000/05/12 18:20:00 JST
163    Tag: blume-20000512-ml-build
164    Description:
165    
166    Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
167    getting installed properly (by config/install.sh).
168    
169    ----------------------------------------------------------------------
170    Name: Matthias Blume
171    Date: 2000/05/12 17:30:00 JST
172    Tag: blume-20000512-anchors
173    Description:
174    
175    !!! NEW BOOT FILES !!!
176    
177    This change is in preparation of fading out support for "implicitly
178    anchored path names".  I went through all sources and used the
179    explicit (and relatively new) $-notation.  See system/README and the
180    CM manual for more info on this.
181    
182    I also modified the anchoring scheme for some things such as "smlnj",
183    "MLRISC", "cm", etc. to take advantage of the fact that explicit
184    anchors are more expressive: anchor name and first arc do not have to
185    coincide.  This entails the following user-visible change:
186    
187    You have to write $smlnj/foo/bar instead of smlnj/foo/bar.  In
188    particular, when you fire up sml with a command-line argument, say,
189    e.g.:
190    
191       sml '$smlnj/cmb.cm'
192    
193    At the ML toplevel prompt:
194    
195       CM.autoload "$smlnj/cmb.cm";
196    
197    There is also a new controller in CM.Control that can be used to turn
198    off all remaining support for implicit anchors by saying:
199    
200        CM.autoload "$smlnj/
201        #set CM.Control.implicit_anchors false;
202    
203    This causes CM to reject implicitly anchored paths.  This is (for the
204    time being) less permissive than the "final" version where there will
205    be no more such implicit anchors and relative paths will be just that:
206    relative.
207    
208    The next step (version after next version?) will be to make the
209    default for CM.Control.implicit_anchors false.  After the dust has
210    settled, I can then produce the "final" version of this...
211    
212    Note: Since bootstrapping is a bit tricky, I provided new boot files.
213    
214    ----------------------------------------------------------------------
215    Name: Matthias Blume
216    Date: 2000/05/11 16:30:00 JST
217    Tag: blume-20000511-sources
218    Description:
219    
220    The main change is that I added function CM.sources as a generalized
221    version of the earlier CM.makedepend.  This entails the following
222    additional changes:
223    
224      - CM.makedepend has been dropped.
225    
226      - CM manual has been updated.
227    
228      - TOOLS signature and API have been changed.
229    
230    ----------------------------------------------------------------------
231    Name: Allen Leung
232    Date: 2000/05/10 21:17 EDT
233    Tag: leunga-20000510-moby-c--ssa
234    Description:
235    
236      Various bug fixes and new features for C--, Moby and MLRISC optimizations.
237    None of these affect SML/NJ.
238    
239    1. Register Allocation
240    
241        a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
242           This module tries to remove local (i.e. basic block level) redundancies
243           during spilling.
244    
245        b. A new framework for performing region based register allocation.
246           Not yet entirely functional.
247    
248    2. X86
249    
250       a. DefUse for POP was missing the stack pointer [found by Lal]
251       b. Reload for CALL was incorrect in X86Spill [found by John]
252       c. Various fixes in X86Spill so that it can be used correctly for
253          the new spilling module.
254    
255    3. SSA/IR
256    
257       a. New module ir/dj-dataflow.sml implements elimination based
258          data flow analysis.
259    
260    4. MLRiscGen
261    
262       a. Fix for gc type annotation
263    
264    5. MDGen
265    
266       Various fixes for machine description -> ml code translation.  For ssa
267       only.
268    
269    ----------------------------------------------------------------------
270    Name: Allen Leung
271    Date: 2000/05/08 22:17 EDT
272    Tag: leunga-20000508-labexp
273    Description:
274    
275      Fermin has found a few assembly problems with constant expressions
276      generated in LabelExp.  Mostly, the problems involve extra parentheses,
277      which choke on dumb assemblers.  This is his fix.
278    
279    ----------------------------------------------------------------------
280    Name: Dave MacQueen
281    Date: 2000/04/09 14:00 EDT
282    Tag: dbm-20000502-Version_110_28
283    Description:
284    
285    1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
286    
287    2. Updated config/version to 110.28
288    
289    3. Updated config/srcarchiveurl
290    
291    3. New boot files!
292       ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
293    
294    ----------------------------------------------------------------------
295    Name: Matthias Blume
296    Date: 2000/05/01 19:05:00 JST
297    Tag: blume-20000501-noweb
298    Description:
299    
300    A new noweb tool has been added.  The existing system is entirely
301    unaffected by this, but some CM users have asked for renewed noweb
302    support.  Everything is documented in the CM manual.
303    
304    New (plugin) libraries:
305    
306       noweb-tool.cm
307       nw-ext.cm
308    
309    ----------------------------------------------------------------------
310    Name: Dave MacQueen
311    Date: 2000/04/30 12:40PM EDT
312    Tag: dbm-20000430-bug_fixes
313    Description:
314    
315    1. Fix for bug 1498
316       smlnj/src/system/Basis/Implementation/Unsafe/object.sig
317       smlnj/src/system/Basis/Implementation/Unsafe/object.sml
318         added toRealArray function
319       smlnj/src/compiler/MiscUtil/print/ppobj.sml
320         added check for tag Obj.RealArray to array printing case in ppObj
321    
322    2. Fix for bug 1510
323       smlnj/src/compiler/Semant/types/typesutil.sml
324         fixed definition of dummyargs (used by equalTycon) so that
325         dummy args are distinct types
326    
327    ----------------------------------------------------------------------
328    Name: Matthias Blume
329    Date: 2000/04/30 01:00:00 JST
330    Tag: blume-20000430-versions
331    Description:
332    
333    1. CM version numbering added.  This is an implementation of Lal's
334       proposal for adding version numbers and version checking to .cm
335       files.  Lal said that his proposal was just that -- a proposal.
336       For the time being I went ahead and implemented it so that people
337       can comment on it.  Everything is completely backward-compatible
338       (except for the stable library format, i.e., new bootfiles!).
339    
340       As usual, see the CM manual for details.
341    
342    2. An alternative syntax for anchored paths has been implemented.
343       Dave has recently voiced the same concerns that I had when I did
344       this, so there should be some support.  My take is that eventually
345       I will let support for the current syntax (where anchors are
346       "implicit") fade out in favor of the new, explicit syntax.
347       In order to be backward-compatible, both old and new syntax are
348       currently supported.
349    
350       Again, see the CM manual for details.
351    
352    3. Parallel make is trying to be slightly smarter:  When the master
353       process finds a "bottleneck", i.e., when there is only one
354       compilation unit that can be compiled and everybody else is
355       waiting on it, then it will simply compile it directly instead
356       of clumsily telling one of the slaves to do it.
357    
358    4. Support for "unsharing" added.  This is necessary in order to be
359       able to have two different versions of the same library running
360       at the same time (e.g., for trying out a new MLRISC while still
361       having the old MLRISC linked into the current compiler, etc.)
362       See the CM manual.
363    
364    5. Simple "makedepend" functionality added for generating Makefile
365       dependency information.  (This is rather crude at the moment.
366       Expect some changes here in the future.)
367    
368    6. ".fun" added as a recognized suffix for ML files. Also documented
369       explicitly in the manual that the fallback behavior (unknown suffix
370       -> ML file) is not an official feature!
371    
372    7. Small changes to the pickler for stable libraries.
373    
374    8. Several internal changes to CM (for cleanup/improvement).
375    
376    
377    !!!! NEW BINFILES !!!!
378    
379    ----------------------------------------------------------------------
380    Name: Matthias Blume
381    Date: 2000/04/28 17:30:00 JST
382    Tag: blume-20000428-pathconfig
383    Description:
384    
385    1. I changed config/install.sh to remove duplicate entries from the
386       lib/pathconfig file at the end.  Moreover, the final version of
387       lib/pathconfig is sorted alphabetically.  The same (sorting) is done
388       in src/system/installml.
389    
390    2. The config/install.sh script now consistently uses relative
391       pathnames in lib/pathconfig whenever the anchor is in the lib
392       directory.  (So far this was true for the libraries that come
393       pre-compiled and bundled as part of the bootfiles but not for
394       libraries that are compiled by the script itself.)
395    
396    ----------------------------------------------------------------------
397    Name: Matthias Blume
398    Date: 2000/04/26 13:10:00 JST
399    Tag: blume-20000426-fun_suffix
400    Description:
401    
402    Added ".fun" as a recognized file name suffix (for ML code).
403    
404    ----------------------------------------------------------------------
405    Name: Allen Leung
406    Date: 2000/04/25 17:00:00 EST
407    Tag: leunga-20000425-alpha-ra
408    Description:
409    
410    1. Alpha
411    
412        PSEUDOARITH was missing in AlphaRewrite.  This causes an endless loop
413    in C--.
414    
415    2. RA
416    
417       Added a flag "ra-dump-size" to print out the size of the flowgraph
418       and the interference graph.
419    
420    ----------------------------------------------------------------------
421    Name: Dave MacQueen
422    Date: 2000/04/25/
423    Tag: dbm-20000425-mlyacc_doc_examples
424    Description:
425      Updated mlyacc.tex sections 5 and 7 for SML '97 and CM.
426      Updated all three examples in src/ml-yacc/examples to run
427      under 110.* using CM.make.
428    
429    ----------------------------------------------------------------------
430    Name: Allen Leung
431    Date: 2000/04/20 23:04:00 EST
432    Tag: leunga-20000420-ssa-c---stuff
433    Description:
434    
435      This update synchronizes my repository with Yale's.  Most of these
436    changes, however, do not affect SML/NJ at all (the RA is an exception).
437    
438    1. Register Allocator
439    
440       a. An improvement in the interference graph construction:
441          Given a copy
442    
443                s <- t
444    
445          no interference edge between s and t is added for this definition of s.
446    
447       b. I've added two new spill heuristic modules that Fermin and I developed
448          (in the new library RA.cm). These are unused in SML/NJ but maybe
449          useful for others (Moby?)
450    
451    2. X86
452    
453       a. Various fixes in the backend provided by Fermin [C--] and Lal.
454    
455    3. Alpha
456    
457       a. Added the BSR instruction and code generation that goes with it [C--]
458       b. Other fixes too numerous to recount provided by Fermin [C--]
459    
460    4. Regmaps
461    
462       a. The regmaps are not initialized with the identity physical bindings
463          at creation time.  This is unneeded.
464    
465    5. MLRISC Optimizations
466    
467       a. The DJ-Graph module can now compute the iterated dominance frontiers
468          intersects with liveness incrementally in linear time! Woohoo!
469          This is now used in my new SSA construction algorithm.
470    
471       b. THe branch reorganization module is now smarter about linear chains of
472          basic blocks.
473    
474    
475    ----------------------------------------------------------------------
476    Name: Matthias Blume
477    Date: 2000/04/12 13:52:00 JST
478    Tag: blume_main_v110p27_1
479    Description:
480    
481    Changed install.sh script to handle archive files without version number
482    and to use "boot.<arch>-<os>" instead of "sml.boot.<arch>-<os>" for the
483    name of the boot file archive.
484    
485    ----------------------------------------------------------------------
486    Name: Dave MacQueen
487    Date: 2000/04/09 14:00 EDT
488    Tag: dbm-20000410-Version_110_27
489    Description:
490    
491    1. Updated src/compiler/TopLevel/main/version.sml to version 110.27
492    
493    2. Updated src/config/version to 110.27
494    
495    3. New boot files!
496    
497    ----------------------------------------------------------------------
498    Name: Allen Leung
499    Date: 2000/04/09 19:09:00 EST
500    Tag: leunga-20000409-misc
501    Description:
502    
503    1.  Yet another fix for x86 assembly for idivl, imull, mull and friends.
504    
505    2.  Miscellaneous improvements to MLRISC (unused in sml/nj)
506    
507    ----------------------------------------------------------------------
508    Name: Stefan
509    Date: 2000/04/07 10:00:00 EDT
510    Tag: monnier-20000406-branch-handling
511    Description:
512    
513    Improved handling of branches (mostly those generated from
514    polymorphic equality), removed switchoff and changed the
515    default optimization settings (more cpsopt and less flintopt).
516    
517    ----------------------------------------------------------------------
518    Name: Allen Leung
519  Date: 2000/04/06 01:30:00 EST  Date: 2000/04/06 01:30:00 EST
520  Tag: leunga-20000406-peephole-x86-SSA-2  Tag: leunga-20000406-peephole-x86-SSA-2
521  Description:  Description:

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