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revision 634, Mon May 1 10:03:50 2000 UTC revision 657, Fri Jun 9 05:20:54 2000 UTC
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12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14  ----------------------------------------------------------------------  ----------------------------------------------------------------------
15    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  Name: Matthias Blume
296  Date: 2000/05/01 19:05:00 JST  Date: 2000/05/01 19:05:00 JST
297  Tag: blume-20000501-noweb  Tag: blume-20000501-noweb

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