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revision 628, Tue Apr 25 21:03:34 2000 UTC revision 653, Wed Jun 7 07:59:06 2000 UTC
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12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14  ----------------------------------------------------------------------  ----------------------------------------------------------------------
15    Name: Matthias Blume
16    Date: 2000/06/07 17:00:00 JST
17    Tag: blume-20000607-no-implicit-anchors
18    Description:
19    
20    1. This update changes the default setting for
21    CM.Control.implicit_anchors from true to false.  This means that
22    implicit anchors are no longer permitted by default.  I also tried to
23    make sure that nothing else still relies on implicit anchors.
24    (This is the next step on the schedule towards a CM that does not even
25    have the notion of implicit anchors anymore.)
26    
27    2. More CM manual updates.
28    
29    3. I managed to track down and fix the pickling bug I mentioned last
30    time.  Because of the previously existing workaround, this entails no
31    immediate practical changes.
32    
33    ----------------------------------------------------------------------
34    Name: Matthias Blume
35    Date: 2000/06/06 11:15:00 JST
36    Tag: blume-20000606-lazierpickle
37    Description:
38    
39    !!!! NEW BOOT FILES !!!!
40    
41    * The main purpose of this update is to make library pickles lazier in
42    order to reduce the initial space penalty for autoloading a library.
43    As a result, it is now possible to have $smlnj/compiler.cm
44    pre-registered.  This should take care of the many complaints or
45    inquiries about missing structure Compiler.  This required changes to
46    CM's internal data structures and small tweaks to some algorithms.
47    
48    As a neat additional effect, it is no longer necessary (for the sake
49    of lean heap image files) to distinguish between a "minimal" CM and a
50    "full" CM.  Now, there is only one CM (i.e., the "full" version:
51    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
52    interactive top level. ($smlnj/cm/minimal.cm is gone.)
53    
54    To make the life of compiler-hackers easier, "makeml" now also
55    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
56    words, after you bootstrap a new sml for the first time, you will not
57    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
58    around you will still have to do it, though.)
59    
60    * A second change consists of major updates to the CM manual.  There
61    are now several appendices with summary information and also a full
62    specification of the CM description file syntax.
63    
64    * In directory src/system I added the script "allcross".  This script
65    invokes sml and cross-compiles the compiler for all supported
66    architectures.  (Useful when providing a new set of boot files.)
67    
68    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
69    added a small tweak to pickle-util.sml to work around this problem,
70    but it is not a proper fix yet.  I will investigate further.  (The
71    effect of the bug was an inflation of library pickle size.)
72    
73    * Version number increased to 110.28.1 (to avoid compatibility problems).
74    
75    ----------------------------------------------------------------------
76    Name: Allen Leung
77    Date: 2000/05/25 17:28 EDT
78    Tag: leunga-20000525-ra
79    Description:
80    
81      Fixed a bug in freezing phase of the register allocator.
82    
83    ----------------------------------------------------------------------
84    Name: Allen Leung
85    Date: 2000/05/15 22:53 EDT
86    Tag: leunga-20000515-alpha-x86-ra
87    Description:
88    
89      1. Alpha
90    
91          Slight cleanup.  Removed the instruction SGNXL
92    
93      2. X86
94    
95          Added the following instructions to the instruction set:
96    
97            ROLx, RORx,
98            BTx, BTSx, BTLx, BTRx,
99            XCHGx, and variants with the LOCK prefix
100    
101      3. Register Allocation
102    
103          The module ra-rewrite-with-renaming has been improved.
104    
105      These have no effect on SML/NJ.
106    
107    ----------------------------------------------------------------------
108    Name: Matthias Blume
109    Date: 2000/05/15 16:20:00 JST
110    Tag: blume-20000515-lightrebuild
111    Description:
112    
113    1. I added an alternative to "-rebuild" to "makeml".  The difference is
114       that prior to calling CMB.make' the CM-variable "LIGHT" will be
115       defined.  In effect, the command will not build any cross-compiler
116       backends and therefore finish more quickly.
117    
118       The "fixpt" script also takes a "-light" switch to be able to use
119       this new facility while compiling for a fixpoint.
120    
121    2. I replaced all mentions of anchored paths in group owner specifications
122       with simple relative paths (usually starting with "..").
123       The rationale is that a library's internal workings should not be
124       compromised by the lack of some anchor.  (An anchor is necessary
125       for someone who wants to refer to the library by an anchored path,
126       but it should not be necessary to build the same library in the first
127       place.)
128    
129    3. I changed the way CM's tool mechanism determines the shell command
130       string used for things like ml-yacc etc. so that it does not break
131       when CM.Control.implicit_anchors is turned off.
132    
133    ----------------------------------------------------------------------
134    Name: Matthias Blume
135    Date: 2000/05/12 18:20:00 JST
136    Tag: blume-20000512-ml-build
137    Description:
138    
139    Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
140    getting installed properly (by config/install.sh).
141    
142    ----------------------------------------------------------------------
143    Name: Matthias Blume
144    Date: 2000/05/12 17:30:00 JST
145    Tag: blume-20000512-anchors
146    Description:
147    
148    !!! NEW BOOT FILES !!!
149    
150    This change is in preparation of fading out support for "implicitly
151    anchored path names".  I went through all sources and used the
152    explicit (and relatively new) $-notation.  See system/README and the
153    CM manual for more info on this.
154    
155    I also modified the anchoring scheme for some things such as "smlnj",
156    "MLRISC", "cm", etc. to take advantage of the fact that explicit
157    anchors are more expressive: anchor name and first arc do not have to
158    coincide.  This entails the following user-visible change:
159    
160    You have to write $smlnj/foo/bar instead of smlnj/foo/bar.  In
161    particular, when you fire up sml with a command-line argument, say,
162    e.g.:
163    
164       sml '$smlnj/cmb.cm'
165    
166    At the ML toplevel prompt:
167    
168       CM.autoload "$smlnj/cmb.cm";
169    
170    There is also a new controller in CM.Control that can be used to turn
171    off all remaining support for implicit anchors by saying:
172    
173        CM.autoload "$smlnj/
174        #set CM.Control.implicit_anchors false;
175    
176    This causes CM to reject implicitly anchored paths.  This is (for the
177    time being) less permissive than the "final" version where there will
178    be no more such implicit anchors and relative paths will be just that:
179    relative.
180    
181    The next step (version after next version?) will be to make the
182    default for CM.Control.implicit_anchors false.  After the dust has
183    settled, I can then produce the "final" version of this...
184    
185    Note: Since bootstrapping is a bit tricky, I provided new boot files.
186    
187    ----------------------------------------------------------------------
188    Name: Matthias Blume
189    Date: 2000/05/11 16:30:00 JST
190    Tag: blume-20000511-sources
191    Description:
192    
193    The main change is that I added function CM.sources as a generalized
194    version of the earlier CM.makedepend.  This entails the following
195    additional changes:
196    
197      - CM.makedepend has been dropped.
198    
199      - CM manual has been updated.
200    
201      - TOOLS signature and API have been changed.
202    
203    ----------------------------------------------------------------------
204    Name: Allen Leung
205    Date: 2000/05/10 21:17 EDT
206    Tag: leunga-20000510-moby-c--ssa
207    Description:
208    
209      Various bug fixes and new features for C--, Moby and MLRISC optimizations.
210    None of these affect SML/NJ.
211    
212    1. Register Allocation
213    
214        a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
215           This module tries to remove local (i.e. basic block level) redundancies
216           during spilling.
217    
218        b. A new framework for performing region based register allocation.
219           Not yet entirely functional.
220    
221    2. X86
222    
223       a. DefUse for POP was missing the stack pointer [found by Lal]
224       b. Reload for CALL was incorrect in X86Spill [found by John]
225       c. Various fixes in X86Spill so that it can be used correctly for
226          the new spilling module.
227    
228    3. SSA/IR
229    
230       a. New module ir/dj-dataflow.sml implements elimination based
231          data flow analysis.
232    
233    4. MLRiscGen
234    
235       a. Fix for gc type annotation
236    
237    5. MDGen
238    
239       Various fixes for machine description -> ml code translation.  For ssa
240       only.
241    
242    ----------------------------------------------------------------------
243    Name: Allen Leung
244    Date: 2000/05/08 22:17 EDT
245    Tag: leunga-20000508-labexp
246    Description:
247    
248      Fermin has found a few assembly problems with constant expressions
249      generated in LabelExp.  Mostly, the problems involve extra parentheses,
250      which choke on dumb assemblers.  This is his fix.
251    
252    ----------------------------------------------------------------------
253    Name: Dave MacQueen
254    Date: 2000/04/09 14:00 EDT
255    Tag: dbm-20000502-Version_110_28
256    Description:
257    
258    1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
259    
260    2. Updated config/version to 110.28
261    
262    3. Updated config/srcarchiveurl
263    
264    3. New boot files!
265       ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
266    
267    ----------------------------------------------------------------------
268    Name: Matthias Blume
269    Date: 2000/05/01 19:05:00 JST
270    Tag: blume-20000501-noweb
271    Description:
272    
273    A new noweb tool has been added.  The existing system is entirely
274    unaffected by this, but some CM users have asked for renewed noweb
275    support.  Everything is documented in the CM manual.
276    
277    New (plugin) libraries:
278    
279       noweb-tool.cm
280       nw-ext.cm
281    
282    ----------------------------------------------------------------------
283    Name: Dave MacQueen
284    Date: 2000/04/30 12:40PM EDT
285    Tag: dbm-20000430-bug_fixes
286    Description:
287    
288    1. Fix for bug 1498
289       smlnj/src/system/Basis/Implementation/Unsafe/object.sig
290       smlnj/src/system/Basis/Implementation/Unsafe/object.sml
291         added toRealArray function
292       smlnj/src/compiler/MiscUtil/print/ppobj.sml
293         added check for tag Obj.RealArray to array printing case in ppObj
294    
295    2. Fix for bug 1510
296       smlnj/src/compiler/Semant/types/typesutil.sml
297         fixed definition of dummyargs (used by equalTycon) so that
298         dummy args are distinct types
299    
300    ----------------------------------------------------------------------
301    Name: Matthias Blume
302    Date: 2000/04/30 01:00:00 JST
303    Tag: blume-20000430-versions
304    Description:
305    
306    1. CM version numbering added.  This is an implementation of Lal's
307       proposal for adding version numbers and version checking to .cm
308       files.  Lal said that his proposal was just that -- a proposal.
309       For the time being I went ahead and implemented it so that people
310       can comment on it.  Everything is completely backward-compatible
311       (except for the stable library format, i.e., new bootfiles!).
312    
313       As usual, see the CM manual for details.
314    
315    2. An alternative syntax for anchored paths has been implemented.
316       Dave has recently voiced the same concerns that I had when I did
317       this, so there should be some support.  My take is that eventually
318       I will let support for the current syntax (where anchors are
319       "implicit") fade out in favor of the new, explicit syntax.
320       In order to be backward-compatible, both old and new syntax are
321       currently supported.
322    
323       Again, see the CM manual for details.
324    
325    3. Parallel make is trying to be slightly smarter:  When the master
326       process finds a "bottleneck", i.e., when there is only one
327       compilation unit that can be compiled and everybody else is
328       waiting on it, then it will simply compile it directly instead
329       of clumsily telling one of the slaves to do it.
330    
331    4. Support for "unsharing" added.  This is necessary in order to be
332       able to have two different versions of the same library running
333       at the same time (e.g., for trying out a new MLRISC while still
334       having the old MLRISC linked into the current compiler, etc.)
335       See the CM manual.
336    
337    5. Simple "makedepend" functionality added for generating Makefile
338       dependency information.  (This is rather crude at the moment.
339       Expect some changes here in the future.)
340    
341    6. ".fun" added as a recognized suffix for ML files. Also documented
342       explicitly in the manual that the fallback behavior (unknown suffix
343       -> ML file) is not an official feature!
344    
345    7. Small changes to the pickler for stable libraries.
346    
347    8. Several internal changes to CM (for cleanup/improvement).
348    
349    
350    !!!! NEW BINFILES !!!!
351    
352    ----------------------------------------------------------------------
353    Name: Matthias Blume
354    Date: 2000/04/28 17:30:00 JST
355    Tag: blume-20000428-pathconfig
356    Description:
357    
358    1. I changed config/install.sh to remove duplicate entries from the
359       lib/pathconfig file at the end.  Moreover, the final version of
360       lib/pathconfig is sorted alphabetically.  The same (sorting) is done
361       in src/system/installml.
362    
363    2. The config/install.sh script now consistently uses relative
364       pathnames in lib/pathconfig whenever the anchor is in the lib
365       directory.  (So far this was true for the libraries that come
366       pre-compiled and bundled as part of the bootfiles but not for
367       libraries that are compiled by the script itself.)
368    
369    ----------------------------------------------------------------------
370    Name: Matthias Blume
371    Date: 2000/04/26 13:10:00 JST
372    Tag: blume-20000426-fun_suffix
373    Description:
374    
375    Added ".fun" as a recognized file name suffix (for ML code).
376    
377    ----------------------------------------------------------------------
378  Name: Allen Leung  Name: Allen Leung
379  Date: 2000/04/25 17:00:00 EST  Date: 2000/04/25 17:00:00 EST
380  Tag: leunga-20000425-alpha-ra  Tag: leunga-20000425-alpha-ra

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