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Annotation of /sml/trunk/HISTORY

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1 : dbm 570 This is the HISTORY file for the Yale SML/NJ CVS repository.
2 :    
3 :     An entry should be made for _every_ commit to the repository.
4 :     The entries in this file will be used when creating the README
5 :     for new versions, so keep that in mind when writing the
6 :     description.
7 :    
8 :     The form of an entry should be:
9 :    
10 :     Name:
11 : george 1003 Date: yyyy/mm/dd
12 : dbm 570 Tag: <post-commit CVS tag>
13 :     Description:
14 : leunga 1025
15 : george 1003 ----------------------------------------------------------------------
16 : blume 1126 Name: Matthias Blume
17 :     Date: 2002/03/07 16:15:00 EST
18 :     Tag: blume-20020307-controls
19 :     Description:
20 :    
21 :     This is a very large but mostly boring patch which makes (almost)
22 :     every tuneable compiler knob (i.e., pretty much everything under
23 :     Control.* plus a few other things) configurable via both the command
24 :     line and environment variables in the style CM did its configuration
25 :     until now.
26 :    
27 :     Try starting sml with '-h' (or, if you are brave, '-H')
28 :    
29 :     To this end, I added a structure Controls : CONTROLS to smlnj-lib.cm which
30 :     implements the underlying generic mechanism.
31 :    
32 :     The interface to some of the existing such facilities has changed somewhat.
33 :     For example, the MLRiscControl module now provides mkFoo instead of getFoo.
34 :     (The getFoo interface is still there for backward-compatibility, but its
35 :     use is deprecated.)
36 :    
37 :     The ml-build script passes -Cxxx=yyy command-line arguments through so
38 :     that one can now twiddle the compiler settings when using this "batch"
39 :     compiler.
40 :    
41 :     TODO items:
42 :    
43 :     We should go through and throw out all controls that are no longer
44 :     connected to anything. Moreover, we should go through and provide
45 :     meaningful (and correct!) documentation strings for those controls
46 :     that still are connected.
47 :    
48 :     Currently, multiple calls to Controls.new are accepted (only the first
49 :     has any effect). Eventually we should make sure that every control
50 :     is being made (via Controls.new) exactly once. Future access can then
51 :     be done using Controls.acc.
52 :    
53 :     Finally, it would probably be a good idea to use the getter-setter
54 :     interface to controls rather than ref cells. For the time being, both
55 :     styles are provided by the Controls module, but getter-setter pairs are
56 :     better if thread-safety is of any concern because they can be wrapped.
57 :    
58 :     *****************************************
59 :    
60 :     One bug fix: The function blockPlacement in three of the MLRISC
61 :     backpatch files used to be hard-wired to one of two possibilities at
62 :     link time (according to the value of the placementFlag). But (I
63 :     think) it should rather sense the flag every time.
64 :    
65 :     *****************************************
66 :    
67 :     Other assorted changes (by other people who did not supply a HISTORY entry):
68 :    
69 :     1. the cross-module inliner now works much better (Monnier)
70 :     2. representation of weights, frequencies, and probabilities in MLRISC
71 :     changed in preparation of using those for weighted block placement
72 :     (Reppy, George)
73 :    
74 :     ----------------------------------------------------------------------
75 : george 1116 Name: Lal George
76 : george 1124 Date: 2002/03/07 14:44:24 EST 2002
77 :     Tag: george-20020307-weighted-block-placement
78 :    
79 :     Tested the weighted block placement optimization on all architectures
80 :     (except the hppa) using AMPL to generate the block and edge frequencies.
81 :     Changes were required in the machine properties to correctly
82 :     categorize trap instructions. There is an MLRISC flag
83 :     "weighted-block-placement" that can be used to enable weighted block
84 :     placement, but this will be ineffective without block/edge
85 :     frequencies (coming soon).
86 :    
87 :    
88 :     ----------------------------------------------------------------------
89 :     Name: Lal George
90 : george 1116 Date: 2002/03/05 17:24:48 EST
91 :     Tag: george-20020305-linkage-cluster
92 :    
93 : george 1124 In order to support the block placement optimization, a new cluster
94 :     is generated as the very first cluster (called the linkage cluster).
95 :     It contains a single jump to the 'real' entry point for the compilation
96 :     unit. Block placement has no effect on the linkage cluster itself, but
97 :     all the other clusters have full freedom in the manner in which they
98 :     reorder blocks or functions.
99 : george 1116
100 :     On the x86 the typical linkage code that is generated is:
101 :     ----------------------
102 :     .align 2
103 :     L0:
104 :     addl $L1-L0, 72(%esp)
105 : george 1124 jmp L1
106 : george 1116
107 :    
108 :     .align 2
109 :     L1:
110 :     ----------------------
111 :    
112 :     72(%esp) is the memory location for the stdlink register. This
113 :     must contain the address of the CPS function being called. In the
114 : george 1124 above example, it contains the address of L0; before
115 : george 1116 calling L1 (the real entry point for the compilation unit), it
116 :     must contain the address for L1, and hence
117 :    
118 :     addl $L1-L0, 72(%esp)
119 :    
120 : george 1124 I have tested this on all architectures except the hppa.The increase
121 :     in code size is of course negligible
122 : george 1116
123 :     ----------------------------------------------------------------------
124 : leunga 1115 Name: Allen Leung
125 :     Date: 2002/03/03 13:20:00 EST
126 :     Tag: leunga-20020303-mlrisc-tools
127 :    
128 :     Added #[ ... ] expressions to mlrisc tools
129 :    
130 :     ----------------------------------------------------------------------
131 : blume 1096 Name: Matthias Blume
132 : blume 1098 Date: 2002/02/27 12:29:00 EST
133 :     Tag: blume-20020227-cdebug
134 :     Description:
135 :    
136 :     - made types in structure C and C_Debug to be equal
137 :     - got rid of code duplication (c-int.sml vs. c-int-debug.sml)
138 :     - there no longer is a C_Int_Debug (C_Debug is directly derived from C)
139 :    
140 :     ----------------------------------------------------------------------
141 :     Name: Matthias Blume
142 : blume 1096 Date: 2002/02/26 12:00:00 EST
143 :     Tag: blume-20020226-ffi
144 :     Description:
145 :    
146 :     1. Fixed a minor bug in CM's "noweb" tool:
147 :     If numbering is turned off, then truly don't number (i.e., do not
148 :     supply the -L option to noweb). The previous behavior was to supply
149 :     -L'' -- which caused noweb to use the "default" line numbering scheme.
150 :     Thanks to Chris Richards for pointing this out (and supplying the fix).
151 :    
152 :     2. Once again, I reworked some aspects of the FFI:
153 :    
154 :     A. The incomplete/complete type business:
155 :    
156 :     - Signatures POINTER_TO_INCOMPLETE_TYPE and accompanying functors are
157 :     gone!
158 :     - ML types representing an incomplete type are now *equal* to
159 :     ML types representing their corresponding complete types (just like
160 :     in C). This is still safe because ml-nlffigen will not generate
161 :     RTTI for incomplete types, nor will it generate functions that
162 :     require access to such RTTI. But when ML code generated from both
163 :     incomplete and complete versions of the C type meet, the ML types
164 :     are trivially interoperable.
165 :    
166 :     NOTE: These changes restore the full generality of the translation
167 :     (which was previously lost when I eliminated functorization)!
168 :    
169 :     B. Enum types:
170 :    
171 :     - Structure C now has a type constructor "enum" that is similar to
172 :     how the "su" constructor works. However, "enum" is not a phantom
173 :     type because each "T enum" has values (and is isomorphic to
174 :     MLRep.Signed.int).
175 :     - There are generic access operations for enum objects (using
176 :     MLRep.Signed.int).
177 :     - ml-nlffigen will generate a structure E_foo for each "enum foo".
178 :     * The structure contains the definition of type "mlrep" (the ML-side
179 :     representation type of the enum). Normally, mlrep is the same
180 :     as "MLRep.Signed.int", but if ml-nlffigen was invoked with "-ec",
181 :     then mlrep will be defined as a datatype -- thus facilitating
182 :     pattern matching on mlrep values.
183 :     ("-ec" will be suppressed if there are duplicate values in an
184 :     enumeration.)
185 :     * Constructors ("-ec") or values (no "-ec") e_xxx of type mlrep
186 :     will be generated for each C enum constant xxx.
187 :     * Conversion functions m2i and i2m convert between mlrep and
188 :     MLRep.Signed.int. (Without "-ec", these functions are identities.)
189 :     * Coversion functions c and ml convert between mlrep and "tag enum".
190 :     * Access functions (get/set) fetch and store mlrep values.
191 :     - By default (unless ml-nlffigen was invoked with "-nocollect"), unnamed
192 :     enumerations are merged into one single enumeration represented by
193 :     structure E_'.
194 :    
195 :     ----------------------------------------------------------------------
196 : leunga 1080 Name: Allen Leung
197 : leunga 1094 Date: 2002/02/25 04:45:00 EST
198 :     Tag: leunga-20020225-cps-spill
199 :    
200 :     This is a new implementation of the CPS spill phase.
201 :     The new phase is in the new file compiler/CodeGen/cpscompile/spill-new.sml
202 :     In case of problems, replace it with the old file spill.sml
203 :    
204 :     The current compiler runs into some serious performance problems when
205 :     constructing a large record. This can happen when we try to compile a
206 :     structure with many items. Even a very simple structure like the following
207 :     makes the compiler slow down.
208 :    
209 :     structure Foo = struct
210 :     val x_1 = 0w1 : Word32.int
211 :     val x_2 = 0w2 : Word32.int
212 :     val x_3 = 0w3 : Word32.int
213 :     ...
214 :     val x_N = 0wN : Word32.int
215 :     end
216 :    
217 :     The following table shows the compile time, from N=1000 to N=4000,
218 :     with the old compiler:
219 :    
220 :     N
221 :     1000 CPS 100 spill 0.04u 0.00s 0.00g
222 :     MLRISC ra 0.06u 0.00s 0.05g
223 :     (spills = 0 reloads = 0)
224 :     TOTAL 0.63u 0.07s 0.21g
225 :    
226 :     1100 CPS 100 spill 8.25u 0.32s 0.64g
227 :     MLRISC ra 5.68u 0.59s 3.93g
228 :     (spills = 0 reloads = 0)
229 :     TOTAL 14.71u 0.99s 4.81g
230 :    
231 :     1500 CPS 100 spill 58.55u 2.34s 1.74g
232 :     MLRISC ra 5.54u 0.65s 3.91g
233 :     (spills = 543 reloads = 1082)
234 :     TOTAL 65.40u 3.13s 6.00g
235 :    
236 :     2000 CPS 100 spill 126.69u 4.84s 3.08g
237 :     MLRISC ra 0.80u 0.10s 0.55g
238 :     (spills = 42 reloads = 84)
239 :     TOTAL 129.42u 5.10s 4.13g
240 :    
241 :     3000 CPS 100 spill 675.59u 19.03s 11.64g
242 :     MLRISC ra 2.69u 0.27s 1.38g
243 :     (spills = 62 reloads = 124)
244 :     TOTAL 682.48u 19.61s 13.99g
245 :    
246 :     4000 CPS 100 spill 2362.82u 56.28s 43.60g
247 :     MLRISC ra 4.96u 0.27s 2.72g
248 :     (spills = 85 reloads = 170)
249 :     TOTAL 2375.26u 57.21s 48.00g
250 :    
251 :     As you can see the old cps spill module suffers from some serious
252 : leunga 1115 performance problem. But since I cannot decipher the old code fully,
253 :     instead of patching the problems up, I'm reimplementing it
254 : leunga 1094 with a different algorithm. The new code is more modular,
255 :     smaller when compiled, and substantially faster
256 :     (O(n log n) time and O(n) space). Timing of the new spill module:
257 :    
258 :     4000 CPS 100 spill 0.02u 0.00s 0.00g
259 :     MLRISC ra 0.25u 0.02s 0.15g
260 :     (spills=1 reloads=3)
261 :     TOTAL 7.74u 0.34s 1.62g
262 :    
263 :     Implementation details:
264 :    
265 :     As far as I can tell, the purpose of the CPS spill module is to make sure the
266 :     number of live variables at any program point (the bandwidth)
267 :     does not exceed a certain limit, which is determined by the
268 :     size of the spill area.
269 :    
270 :     When the bandwidth is too large, we decrease the register pressure by
271 :     packing live variables into spill records. How we achieve this is
272 :     completely different than what we did in the old code.
273 :    
274 :     First, there is something about the MLRiscGen code generator
275 :     that we should be aware of:
276 :    
277 :     o MLRiscGen performs code motion!
278 :    
279 :     In particular, it will move floating point computations and
280 :     address computations involving only the heap pointer to
281 :     their use sites (if there is only a single use).
282 :     What this means is that if we have a CPS record construction
283 :     statement
284 :    
285 :     RECORD(k,vl,w,e)
286 :    
287 :     we should never count the new record address w as live if w
288 :     has only one use (which is often the case).
289 :    
290 :     We should do something similar to floating point, but the transformation
291 :     there is much more complex, so I won't deal with that.
292 :    
293 :     Secondly, there are now two new cps primops at our disposal:
294 :    
295 :     1. rawrecord of record_kind option
296 :     This pure operator allocates some uninitialized storage from the heap.
297 :     There are two forms:
298 :    
299 :     rawrecord NONE [INT n] allocates a tagless record of length n
300 :     rawrecord (SOME rk) [INT n] allocates a tagged record of length n
301 :     and initializes the tag.
302 :    
303 :     2. rawupdate of cty
304 :     rawupdate cty (v,i,x)
305 :     Assigns to x to the ith component of record v.
306 :     The storelist is not updated.
307 :    
308 :     We use these new primops for both spilling and increment record construction.
309 :    
310 :     1. Spilling.
311 :    
312 :     This is implemented with a linear scan algorithm (but generalized
313 :     to trees). The algorithm will create a single spill record at the
314 :     beginning of the cps function and use rawupdate to spill to it,
315 :     and SELECT or SELp to reload from it. So both spills and reloads
316 :     are fine-grain operations. In contrast, in the old algorithm
317 :     "spills" have to be bundled together in records.
318 :    
319 :     Ideally, we should sink the spill record construction to where
320 :     it is needed. We can even split the spill record into multiple ones
321 :     at the places where they are needed. But CPS is not a good
322 :     representation for global code motion, so I'll keep it simple and
323 :     am not attempting this.
324 :    
325 :     2. Incremental record construction (aka record splitting).
326 :    
327 :     Long records with many component values which are simulatenously live
328 :     (recall that single use record addresses are not considered to
329 :     be live) are constructed with rawrecord and rawupdate.
330 :     We allocate space on the heap with rawrecord first, then gradually
331 :     fill it in with rawupdate. This is the technique suggested to me
332 :     by Matthias.
333 :    
334 :     Some restrictions on when this is applicable:
335 :     1. It is not a VECTOR record. The code generator currently does not handle
336 :     this case. VECTOR record uses double indirection like arrays.
337 :     2. All the record component values are defined in the same "basic block"
338 :     as the record constructor. This is to prevent speculative
339 :     record construction.
340 :    
341 :     ----------------------------------------------------------------------
342 :     Name: Allen Leung
343 : leunga 1086 Date: 2002/02/22 01:02:00 EST
344 :     Tag: leunga-20020222-mlrisc-tools
345 :    
346 :     Minor bug fixes in the parser and rewriter
347 :    
348 :     ----------------------------------------------------------------------
349 :     Name: Allen Leung
350 : leunga 1085 Date: 2002/02/21 20:20:00 EST
351 :     Tag: leunga-20020221-peephole
352 :    
353 :     Regenerated the peephole files. Some contained typos in the specification
354 :     and some didn't compile because of pretty printing bugs in the old version
355 :     of 'nowhere'.
356 :    
357 :     ----------------------------------------------------------------------
358 :     Name: Allen Leung
359 : leunga 1079 Date: 2002/02/19 20:20:00 EST
360 :     Tag: leunga-20020219-mlrisc-tools
361 :     Description:
362 :    
363 :     Minor bug fixes to the mlrisc-tools library:
364 :    
365 :     1. Fixed up parsing colon suffixed keywords
366 :     2. Added the ability to shut the error messages up
367 :     3. Reimplemented the pretty printer and fixed up/improved
368 :     the pretty printing of handle and -> types.
369 :     4. Fixed up generation of literal symbols in the nowhere tool.
370 :     5. Added some SML keywords to to sml.sty
371 :    
372 :     ----------------------------------------------------------------------
373 :     Name: Matthias Blume
374 : blume 1078 Date: 2002/02/19 16:20:00 EST
375 :     Tag: blume-20020219-cmffi
376 :     Description:
377 :    
378 :     A wild mix of changes, some minor, some major:
379 :    
380 :     * All C FFI-related libraries are now anchored under $c:
381 :     $/c.cm --> $c/c.cm
382 :     $/c-int.cm --> $c/internals/c-int.cm
383 :     $/memory.cm --> $c/memory/memory.cm
384 :    
385 :     * "make" tool (in CM) now treats its argument pathname slightly
386 :     differently:
387 :     1. If the native expansion is an absolute name, then before invoking
388 :     the "make" command on it, CM will apply OS.Path.mkRelative
389 :     (with relativeTo = OS.FileSys.getDir()) to it.
390 :     2. The argument will be passed through to subsequent phases of CM
391 :     processing without "going native". In particular, if the argument
392 :     was an anchored path, then "make" will not lose track of that anchor.
393 :    
394 :     * Compiler backends now "know" their respective C calling conventions
395 :     instead of having to be told about it by ml-nlffigen. This relieves
396 :     ml-nlffigen from one of its burdens.
397 :    
398 :     * The X86Backend has been split into X86CCallBackend and X86StdCallBackend.
399 :    
400 :     * Export C_DEBUG and C_Debug from $c/c.cm.
401 :    
402 :     * C type encoding in ml-nlffi-lib has been improved to model the conceptual
403 :     subtyping relationship between incomplete pointers and their complete
404 :     counterparts. For this, ('t, 'c) ptr has been changed to 'o ptr --
405 :     with the convention of instantiating 'o with ('t, 'c) obj whenever
406 :     the pointer target type is complete. In the incomplete case, 'o
407 :     will be instantiated with some "'c iobj" -- a type obtained by
408 :     using one of the functors PointerToIncompleteType or PointerToCompleteType.
409 :    
410 :     Operations that work on both incomplete and complete pointer types are
411 :     typed as taking an 'o ptr while operations that require the target to
412 :     be known are typed as taking some ('t, 'c) obj ptr.
413 :    
414 :     voidptr is now a bit "more concrete", namely "type voidptr = void ptr'"
415 :     where void is an eqtype without any values. This makes it possible
416 :     to work on voidptr values using functions meant to operate on light
417 :     incomplete pointers.
418 :    
419 :     * As a result of the above, signature POINTER_TO_INCOMPLETE_TYPE has
420 :     been vastly simplified.
421 :    
422 :     ----------------------------------------------------------------------
423 :     Name: Matthias Blume
424 : blume 1076 Date: 2002/02/19 10:48:00 EST
425 :     Tag: blume-20020219-pqfix
426 :     Description:
427 :    
428 :     Applied Chris Okasaki's bug fix for priority queues.
429 :    
430 :     ----------------------------------------------------------------------
431 :     Name: Matthias Blume
432 : blume 1073 Date: 2002/02/15 17:05:00
433 : blume 1069 Tag: Release_110_39
434 :     Description:
435 :    
436 : blume 1073 Last-minute retagging is becoming a tradition... :-(
437 :    
438 :     This is the working release 110.39.
439 :    
440 :     ----------------------------------------------------------------------
441 :     Name: Matthias Blume
442 :     Date: 2002/02/15 16:00:00 EST
443 :     Tag: Release_110_39-orig
444 :     Description:
445 :    
446 : blume 1069 Working release 110.39. New bootfiles.
447 :    
448 : blume 1073 (Update: There was a small bug in the installer so it wouldn't work
449 :     with all shells. So I retagged. -Matthias)
450 :    
451 : blume 1069 ----------------------------------------------------------------------
452 :     Name: Matthias Blume
453 : blume 1068 Date: 2002/02/15 14:17:00 EST
454 :     Tag: blume-20020215-showbindings
455 :     Description:
456 :    
457 :     Added EnvRef.listBoundSymbols and CM.State.showBindings. Especially
458 :     the latter can be useful for exploring what bindings are available at
459 :     the interactive prompt. (The first function returns only the list
460 :     of symbols that are really bound, the second prints those but also the
461 :     ones that CM's autoloading mechanism knows about.)
462 :    
463 :     ----------------------------------------------------------------------
464 :     Name: Matthias Blume
465 : blume 1067 Date: 2002/02/15 12:08:00 EST
466 :     Tag: blume-20020215-iptrs
467 :     Description:
468 :    
469 :     Two improvements to ml-nlffigen:
470 :    
471 :     1. Write files only if they do not exist or if their current contents
472 :     do not coincide with what's being written. (That is, avoid messing
473 :     with the time stamps unless absolutely necessary.)
474 :    
475 :     2. Implement a "repository" mechanism for generated files related
476 :     to "incomplete pointer types". See the README file for details.
477 :    
478 :     ----------------------------------------------------------------------
479 :     Name: Matthias Blume
480 : blume 1066 Date: 2002/02/14 11:50:00 EST
481 :     Tag: blume-20020214-quote
482 :     Description:
483 :    
484 :     Added a type 't t_' to tag.sml (in ml-nlffi-lib.cm). This is required
485 :     because of the new and improved tag generation scheme. (Thanks to Allen
486 :     Leung for pointing it out.)
487 :    
488 :     ----------------------------------------------------------------------
489 : george 1065 Name: Lal George
490 :     Date: 2002/02/14 09:55:27 EST 2002
491 :     Tag: george-20020214-isabelle-bug
492 :     Description:
493 :    
494 :     Fixed the MLRISC bug sent by Markus Wenzel regarding the compilation
495 :     of Isabelle on the x86.
496 :    
497 :     From Allen:
498 :     -----------
499 :     I've found the problem:
500 :    
501 :     in ra-core.sml, I use the counter "blocked" to keep track of the
502 :     true number of elements in the freeze queue. When the counter goes
503 :     to zero, I skip examining the queue. But I've messed up the
504 :     bookkeeping in combine():
505 :    
506 :     else ();
507 :     case !ucol of
508 :     PSEUDO => (if !cntv > 0 then
509 :     (if !cntu > 0 then blocked := !blocked - 1 else ();
510 :     ^^^^^^^^^^^^^^^^^^^^^^^
511 :     moveu := mergeMoveList(!movev, !moveu)
512 :     )
513 :     else ();
514 :    
515 :     combine() is called to coalesce two nodes u and v.
516 :     I think I was thinking that if the move counts of u and v are both
517 :     greater than zero then after they are coalesced then one node is
518 :     removed from the freeze queue. Apparently I was thinking that
519 :     both u and v are of low degree, but that's clearly not necessarily true.
520 :    
521 :    
522 :     02/12/2002:
523 :     Here's the patch. HOL now compiles.
524 :    
525 :     I don't know how this impact on performance (compile
526 :     time or runtime). This bug caused the RA (especially on the x86)
527 :     to go thru the potential spill phase when there are still nodes on the
528 :     freeze queue.
529 :    
530 :    
531 :    
532 :    
533 :     ----------------------------------------------------------------------
534 : blume 1058 Name: Matthias Blume
535 : blume 1064 Date: 2002/02/13 22:40:00 EST
536 :     Tag: blume-20020213-fptr-rtti
537 :     Description:
538 :    
539 :     Fixed a bug in ml-nlffigen that was introduced with one of the previous
540 :     updates.
541 :    
542 :     ----------------------------------------------------------------------
543 :     Name: Matthias Blume
544 : blume 1063 Date: 2002/02/13 16:41:00 EST
545 :     Tag: blume-20020213-cmlpq
546 :     Description:
547 :    
548 :     Added new priority queue export symbols (which have just been added to
549 :     smlnj-lib.cm) to CML's version of smlnj-lib.cm. (Otherwise CML would
550 :     not compile and the installer would choke.)
551 :    
552 :     ----------------------------------------------------------------------
553 :     Name: Matthias Blume
554 : blume 1062 Date: 2002/02/13 16:15:00 EST
555 :     Tag: blume-20020213-various
556 :     Description:
557 :    
558 :     1. More tweaks to ml-nlffigen:
559 :    
560 :     - better internal datastructures (resulting in slight speedup)
561 :     - "-match" option requires exact match
562 :     - "localized" gensym counters (untagged structs/unions nested within
563 :     other structs/unions or within typedefs get a fresh counter; their
564 :     tag will be prefixed by a concatenation of their parents' tags)
565 :     - bug fixes (related to calculation of transitive closure of types
566 :     to be included in the output)
567 :    
568 :     2. Minor Basis updates:
569 :    
570 :     - added implementations for List.collate and Option.app
571 :    
572 :     ----------------------------------------------------------------------
573 :     Name: Matthias Blume
574 : blume 1060 Date: 2002/02/11 15:55:00 EST
575 :     Tag: blume-20020211-gensym
576 :     Description:
577 :    
578 :     Added a "-gensym" option to command line of ml-nlffigen. This can be
579 :     used to specify a "stem" -- a string that is inserted in all "gensym'd"
580 :     names (ML structure names that correspond to unnamed C structs, unions,
581 :     and enums), so that separate runs of ml-nlffigen do not clash.
582 :    
583 :     ----------------------------------------------------------------------
584 :     Name: Matthias Blume
585 : blume 1059 Date: 2002/02/11 12:05:00 EST
586 :     Tag: blume-20020211-gensml
587 :     Description:
588 :    
589 :     A quick fix for a problem with GenSML (in the pgraph-util library):
590 :     Make generation of toplevel "local" optional. (Strictly speaking,
591 :     signature definitions within "local" are not legal SML.)
592 :    
593 :     Other than that: updates to INSTALL and cm/TODO.
594 :    
595 :     ----------------------------------------------------------------------
596 :     Name: Matthias Blume
597 : blume 1058 Date: 2002/02/08 15:00:00 EST
598 :     Tag: blume-20020208-uniquepid
599 :     Description:
600 :    
601 :     0. Version number has been bumped to 110.38.1. NEW BOOTFILES!!!
602 :    
603 :     1. The installer (config/install.sh) has gotten smarter:
604 :    
605 :     - Configuration options are a bit easier to specify now
606 :     (in config/targets).
607 :     - Bug in recognizing .tar.bz2 files fixed.
608 :     - Installer automatically resolves dependencies between
609 :     configuration options (e.g., if you ask for eXene, you will
610 :     also get cml -- regardless whether you asked for it or not).
611 :     - Installer can run in "quieter mode" by setting the environment
612 :     variable INSTALL_QUIETLY to "true". "Quieter" does not mean
613 :     "completely silent", though.
614 :     - Build HashCons library as part of smlnj-lib.
615 :    
616 :     2. A new scheme for assigning persistent identifiers to compilation
617 :     units (and, by extension, to types etc.) has been put into place.
618 :     This fixes a long-standing bug where types and even dynamic values
619 :     can get internally confused, thereby compromising type safety
620 :     (abstraction) and dynamic correctness. See
621 :    
622 :     http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
623 :    
624 :     for an example of how things could go wrong until now.
625 :    
626 :     The downside of the new scheme is that pids are not quite as
627 :     persistent as they used to be: CM will generate a fresh pid
628 :     for every compilation unit that it thinks it sees for the first
629 :     time. That means that if you compile starting from a clean, fresh
630 :     source tree at two different times, you end up with different
631 :     binaries.
632 :    
633 :     Cutoff recompilation, however, has not been compromised because
634 :     CM keeps pid information in special caches between runs.
635 :    
636 :     ----------------------------------------------------------------------
637 : george 1053 Name: Lal George
638 : george 1055 Date: 2002/02/07 15:34:13 EST 2002
639 :     Tag: <none>
640 :     Description:
641 :    
642 :     Compilers that generate assembly code may produce global labels
643 :     whose value is resolved at link time. The various peephole optimization
644 :     modules did not take this in account.
645 :    
646 :     TODO. The Labels.addrOf function should really return an option
647 :     type so that clients are forced to deal with this issue, rather
648 :     than an exception being raised.
649 :    
650 :     ----------------------------------------------------------------------
651 :     Name: Lal George
652 : george 1053 Date: 2002/02/06 13:55:02 EST
653 :     Tag: george-20020206-ra-breakup
654 :     Description:
655 :    
656 :     1. A bug fix from Allen.
657 :    
658 :     A typo causes extra fstp %st(0)'s to be generated at compensation
659 :     edges, which might cause stack underflow traps at runtime. This
660 :     occurs in fft where there are extraneous fstps right before the 'into'
661 :     trap instruction (in this case they are harmless since none of the
662 :     integers overflow.)
663 :    
664 : george 1054 2. Pulled out various utility modules that were embedded in the modules
665 : george 1053 of the register allocator. I need these modules for other purposes, but
666 : george 1054 they are not complete enough to put into a library (just yet).
667 : george 1053 ----------------------------------------------------------------------
668 : blume 1049 Name: Matthias Blume
669 :     Date: 2002/01/31 16:05:00 EST
670 :     Tag: blume-20020131-sparc-ccalls
671 :     Description:
672 :    
673 :     1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
674 :     of extra stack space by mistake. Fixed.
675 :    
676 :     2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
677 :    
678 :     ----------------------------------------------------------------------
679 : leunga 1048 Name: Allen Leung
680 :     Date: 2002/01/30
681 :     Tag: leunga-20020130-nowhere-bug-fix
682 :     Description:
683 :    
684 :     MLRISC bug fixes:
685 :     1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
686 :     2. MachineInt.fromString was negating its value.
687 :    
688 :     ----------------------------------------------------------------------
689 : blume 1039 Name: Matthias Blume
690 : blume 1047 Date: 2002/01/29
691 :     Tag: blume-20020129-INSTALL
692 :     Description:
693 :    
694 :     - Added somewhat detailed installation instructions (file INSTALL).
695 :     - Fixed curl-detection bug in config/install.sh.
696 :     - It is now possible to select the URL getter using the URLGETTER
697 :     environment variable:
698 :    
699 :     not set / "unknown" --> automatic detection (script tries wget,
700 :     curl, and lynx)
701 :     "wget" / "curl" / "lynx" --> use the specified program (script "knows"
702 :     how to properly invoke them)
703 :     other --> use $URLGETTER directly, it must take
704 :     precisely two command-line arguments
705 :     (source URL and destination file name)
706 :    
707 :     ----------------------------------------------------------------------
708 :     Name: Matthias Blume
709 : blume 1044 Date: 2002/01/28
710 : blume 1045 Tag: blume-20020128-sparc-ccalls
711 :     Description:
712 :    
713 :     - Fixed problem with calculation of "used" registers in sparc-c-calls.
714 :     - Make use of the allocParam argument in sparc-c-calls.
715 :    
716 :     ----------------------------------------------------------------------
717 :     Name: Matthias Blume
718 :     Date: 2002/01/28
719 : blume 1044 Tag: blume-20020128-allocParam
720 :     Description:
721 :    
722 :     John Reppy: Changes c-calls API to accept client-callback for
723 :     allocating extra stack space.
724 :     me: Corresponding changes to mlriscGen (using a dummy argument that
725 :     does not change the current behavior).
726 :    
727 :     ----------------------------------------------------------------------
728 :     Name: Matthias Blume
729 : blume 1040 Date: 2002/01/28 12:00:00
730 :     Tag: Release_110_38
731 :     Description:
732 :    
733 :     This time for real!!!
734 :    
735 :     ----------------------------------------------------------------------
736 :     Name: Matthias Blume
737 : blume 1039 Date: 2002/01/28 10:56:00 EST
738 :     Tag: blume-20020128-retraction
739 :     Description:
740 :    
741 :     0. Retracted earlier 110.38. (The Release_110_38 tag has been replaced
742 :     with blume-Release_110_38-retracted.)
743 :    
744 :     1. Fixed a problem with incorrect rounding modes in real64.sml.
745 :     (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
746 :    
747 :     2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
748 :     and enums fixed. The naming of corresponding ML identifiers should
749 :     now be consistent again.
750 :    
751 :     ----------------------------------------------------------------------
752 : leunga 1038 Name: Allen Leung
753 :     Date: 2002/01/27
754 :     Tag: leunga-20020127-nowhere
755 :     Description:
756 :    
757 :     Added a target called nowhere in the configuration scripts.
758 :     Enabling this will build the MLRISC 'nowhere' tool (for translating
759 :     programs with where-clauses into legal SML code) during installation.
760 :    
761 :     ----------------------------------------------------------------------
762 : blume 1036 Name: Matthias Blume
763 : leunga 1038 Date: 2002/01/25 21:27:00 EST
764 : blume 1039 Tag: blume-Release_110_38-retracted
765 : blume 1037 Description:
766 :    
767 :     Call it a (working) release! Version is 110.38. Bootfiles are ready.
768 :    
769 :     README will be added later.
770 :    
771 : blume 1039 !!! NOTE: Re-tagged as blume-Release_110_38-retracted. Original tag
772 :     (Release_110_38) removed. Reason: Last-minute bug fixes.
773 :    
774 : blume 1037 ----------------------------------------------------------------------
775 :     Name: Matthias Blume
776 : blume 1036 Date: 2002/01/25
777 :     Tag: blume-20020125-ffi
778 :     Description:
779 :    
780 :     A large number of tweaks and improvements to ml-nlffi-lib and
781 :     ml-nlffigen:
782 :    
783 :     - ML represenation types have been streamlined
784 :     - getter and setter functions work with concrete values, not abstract
785 :     ones where possible
786 :     - ml-nlffigen command line more flexible (see README file there)
787 :     - some bugs have been fixed (hopefully)
788 :    
789 :     ----------------------------------------------------------------------
790 : george 1034 Name: Lal George
791 :     Date: 2002/01/24
792 :     Tag: george-20020124-risc-ra-interface
793 :     Description:
794 :    
795 :     There is a dramatic simplification in the interface to the
796 :     register allocator for RISC architectures as a result of making
797 :     parallel copy instructions explicit.
798 :    
799 :     ----------------------------------------------------------------------
800 : blume 1028 Name: Matthias Blume
801 : blume 1032 Date: 2002/01/22
802 :     Tag: blume-20020122-x86-ccalls
803 :     Description:
804 :    
805 :     Bug fix for c-calls on x86 (having to do with how char- and
806 :     short-arguments are being handled).
807 :    
808 :     ----------------------------------------------------------------------
809 :     Name: Matthias Blume
810 : blume 1031 Date: 2002/01/21
811 :     Tag: blume-20020121-ff
812 :     Description:
813 :    
814 :     Another day of fiddling with the FFI...
815 :    
816 :     1. Bug fix/workaround: CKIT does not complain about negative array
817 :     dimensions, so ml-nlffigen has to guard itself against this possibility.
818 :     (Otherwise a negative dimension would send it into an infinite loop.)
819 :    
820 :     2. Some of the abstract types (light objects, light pointers, most "base"
821 :     types) in structure C are now eqtypes.
822 :    
823 :     3. Added constructors and test functions for NULL function pointers.
824 :    
825 :     ----------------------------------------------------------------------
826 :     Name: Matthias Blume
827 : blume 1028 Date: 2002/01/18
828 : blume 1030 Tag: blume-20020118-ready-for-new-release
829 :     Description:
830 :    
831 :     Made config/srcarchiveurl point to a new place. (Will provide boot
832 :     files shortly.)
833 :    
834 :     Maybe we christen this to be 110.38?
835 :    
836 :     ----------------------------------------------------------------------
837 :     Name: Matthias Blume
838 :     Date: 2002/01/18
839 : blume 1029 Tag: blume-20020118-more-ffifiddle
840 :     Description:
841 :    
842 :     Today's FFI fiddling:
843 :    
844 :     - Provided a structure CGetSet with "convenient" versions of C.Get.* and
845 :     C.Set.* that use concrete (MLRep.*) arguments and results instead
846 :     of abstract ones.
847 :    
848 :     - Provided word-style bit operations etc. for "int" representation
849 :     types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
850 :     and Long.
851 :    
852 :     ----------------------------------------------------------------------
853 :     Name: Matthias Blume
854 :     Date: 2002/01/18
855 : blume 1028 Tag: blume-20020118-use-x86-fp
856 :     Description:
857 :    
858 :     Now that x86-fast-fp seems to be working, I turned it back on again
859 :     by default. (Seems to work fine now, even with the FFI.)
860 :    
861 :     Other than that, I added some documentation about the FFI to
862 :     src/ml-nlffigen/README and updated the FFI test examples in
863 :     src/ml-nlffi-lib/Tests/*.
864 :    
865 :     ----------------------------------------------------------------------
866 : leunga 1025 Name: Allen Leung
867 :     Date: 2002/01/17
868 :     Tag: leunga-20020117-x86-fast-fp-call
869 :     Description:
870 :    
871 :     1. Fixed a problem with handling return fp values when x86's fast fp
872 :     mode is turned on.
873 :    
874 :     2. Minor pretty printing fix for cellset. Print %st(0) as %st(0) instead
875 :     of %f32.
876 :    
877 :     3. Added a constructor INT32lit to the ast of MLRISC tools.
878 :    
879 :     ----------------------------------------------------------------------
880 : blume 1021 Name: Matthias Blume
881 :     Date: 2002/01/16
882 :     Tag: blume-20020116-ffifiddle
883 :     Description:
884 :    
885 :     More fiddling with the FFI interface:
886 :    
887 :     - Make constness 'c instead of rw wherever possible. This eliminates
888 :     the need for certain explicit coercions. (However, due to ML's
889 :     value polymorphism, there will still be many cases where explicit
890 :     coercions are necessary. Phantom types are not the whole answer
891 :     to modeling a subtyping relationship in ML.)
892 :    
893 :     - ro/rw coersions for pointers added. (Avoids the detour through */&.)
894 :    
895 :     - "printf" test example added to src/ml-nlffi-lib/Tests. (Demonstrates
896 :     clumsy workaround for varargs problem.)
897 :    
898 :     ----------------------------------------------------------------------
899 : george 1016 Name: Lal George
900 :     Date: 2002/01/15
901 :     Tag: <none>
902 :     Description:
903 :    
904 :     1. Since COPY instructions are no longer native to the architecture,
905 :     a generic functor can be used to implement the expandCopies function.
906 :    
907 :     2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
908 :     TEXT segment.
909 :    
910 :     ----------------------------------------------------------------------
911 : blume 1011 Name: Matthias Blume
912 : blume 1015 Date: 2002/01/15
913 :     Tag: blume-20020115-ffiupdates
914 :     Description:
915 :    
916 :     1. Fix for bug resulting in single-precision float values being returned
917 :     incorrectly from FFI calls.
918 :    
919 :     2. Small modifications to C FFI API:
920 :    
921 :     - memory-allocation routines return straight objects (no options)
922 :     and raise an exception in out-of-memory situations
923 :     - unsafe extensions to cast between function pointers and pointers
924 :     from/to ints
925 :     - added structure C_Debug as an alternative to structure C where
926 :     pointer-dereferencing (|*| and |*!) always check for null-pointers
927 :     - added open_lib' to DynLinkage; open_lib' works like open_lib
928 :     but also takes a (possibly empty) list of existing library handles
929 :     that the current library depends on
930 :    
931 :     ----------------------------------------------------------------------
932 :     Name: Matthias Blume
933 : blume 1011 Date: 2002/01/10
934 :     Tag: blume-20020110-newffigen
935 :     Description:
936 :    
937 :     1. Updates to portable graph code.
938 :    
939 :     2. Major update to ml-nlffigen and ml-nlffi-lib. Things are much
940 :     more scalable now so that even huge interfaces such as the one
941 :     for GTK compile in finite time and space. :-)
942 :     See src/ml-nlffigen/README for details on what's new.
943 :    
944 :     ----------------------------------------------------------------------
945 : george 1003 Name: Lal George
946 : george 1009 Date: 2001/01/09 14:31:35 EST 2002
947 :     Tag: george-20011206-rm-native-copy
948 :     Description:
949 :    
950 :     Removed the native COPY and FCOPY instructions
951 :     from all the architectures and replaced it with the
952 :     explicit COPY instruction from the previous commit.
953 :    
954 :     It is now possible to simplify many of the optimizations
955 :     modules that manipulate copies. This has not been
956 :     done in this change.
957 :    
958 :     ----------------------------------------------------------------------
959 :     Name: Lal George
960 : george 1003 Date: 2001/12/06 16:50:13 EST 2001
961 :     Tag: george-20011206-mlrisc-instruction
962 :     Description:
963 : george 824
964 : george 1003 Changed the representation of instructions from being fully abstract
965 :     to being partially concrete. That is to say:
966 :    
967 :     from
968 :     type instruction
969 :    
970 :     to
971 :     type instr (* machine instruction *)
972 :    
973 :     datatype instruction =
974 :     LIVE of {regs: C.cellset, spilled: C.cellset}
975 :     | KILL of {regs: C.cellset, spilled: C.cellset}
976 :     | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
977 :     | ANNOTATION of {i: instruction, a: Annotations.annotation}
978 :     | INSTR of instr
979 :    
980 :     This makes the handling of certain special instructions that appear on
981 :     all architectures easier and uniform.
982 :    
983 :     LIVE and KILL say that a list of registers are live or killed at the
984 :     program point where they appear. No spill code is generated when an
985 :     element of the 'regs' field is spilled, but the register is moved to
986 :     the 'spilled' (which is present, more for debugging than anything else).
987 :    
988 :     LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
989 :     We used to generate:
990 :    
991 :     DEFFREG f1
992 :     f1 := f2 + f3
993 :     trapb
994 :    
995 :     but now generate:
996 :    
997 :     f1 := f2 + f3
998 :     trapb
999 :     LIVE {regs=[f1,f2,f3], spilled=[]}
1000 :    
1001 :     Furthermore, the DEFFREG (hack) required that all floating point instruction
1002 :     use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
1003 :     defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
1004 :     in a cleaner alpha implementation. (Hopefully, intel will not get rid of
1005 :     this architecture).
1006 :    
1007 :     COPYXXX is intended to replace the parallel COPY and FCOPY available on
1008 :     all the architectures. This will result in further simplification of the
1009 :     register allocator that must be aware of them for coalescing purposes, and
1010 :     will also simplify certain aspects of the machine description that provides
1011 :     callbacks related to parallel copies.
1012 :    
1013 :     ANNOTATION should be obvious, and now INSTR represents the honest to God
1014 :     machine instruction set!
1015 :    
1016 :     The <arch>/instructions/<arch>Instr.sml files define certain utility
1017 :     functions for making porting easier -- essentially converting upper case
1018 :     to lower case. All machine instructions (of type instr) are in upper case,
1019 :     and the lower case form generates an MLRISC instruction. For example on
1020 :     the alpha we have:
1021 :    
1022 :     datatype instr =
1023 :     LDA of {r:cell, b:cell, d:operand}
1024 :     | ...
1025 :    
1026 :     val lda : {r:cell, b:cell, d:operand} -> instruction
1027 :     ...
1028 :    
1029 :     where lda is just (INSTR o LDA), etc.
1030 :    
1031 : leunga 815 ----------------------------------------------------------------------
1032 : blume 986 Name: Matthias Blume
1033 : blume 993 Date: 2001/11/22 21:40:00 EST
1034 :     Tag: Release_110_37
1035 :     Description:
1036 :    
1037 :     Release 110.37. This time for real.
1038 :    
1039 :     ----------------------------------------------------------------------
1040 :     Name: Matthias Blume
1041 : blume 988 Date: 2001/11/21 16:35:00 EST
1042 :     Tag: blume-20011121-foot-in-mouth
1043 :     Description:
1044 :    
1045 :     Removed the "Release_110_37" tag because of a serious bug.
1046 :     This will be re-tagged once the bug is fixed.
1047 :    
1048 :     ----------------------------------------------------------------------
1049 :     Name: Matthias Blume
1050 : blume 987 Date: 2001/11/21 16:14:00 EST
1051 :     Tag: blume-20011121-forgottenfile
1052 :     Description:
1053 :    
1054 :     Forgot to add a file. (Just a .tex-file -- part of
1055 :     the CM manual source.)
1056 :    
1057 :     ----------------------------------------------------------------------
1058 :     Name: Matthias Blume
1059 : blume 986 Date: 2001/11/21 16:10:00 EST
1060 : blume 988 Tag: blume-20011121-invalid_110_37
1061 : blume 986 Description:
1062 :    
1063 : blume 988 Note: I removed the original tag "Release_110_37" from this commit
1064 :     because we found a serious bug in all non-x86 backends.
1065 :     - Matthias
1066 :    
1067 : blume 986 1. Modifications to the SML/NJ code generator and to the runtime system
1068 :     so that code object name strings are directly inserted into code
1069 :     objects at code generation time. The only business the runtime system
1070 :     has with this is now to read the name strings on occasions.
1071 :     (The encoding of the name string has also changed somewhat.)
1072 :    
1073 :     2. CM now implements a simple "set calculus" for specifying export lists.
1074 :     In particular, it is now possible to refer to the export lists of
1075 :     other libraries/groups/sources and form unions as well as differences.
1076 :     See the latest CM manual for details.
1077 :    
1078 :     3. An separate notion of "proxy" libraries has again be eliminated from
1079 :     CM's model. (Proxy libraries are now simply a special case of using
1080 :     the export list calculus.)
1081 :    
1082 :     4. Some of the existing libraries now take advantage of the new set
1083 :     calculus.
1084 :     (Notice that not all libraries have been converted because some
1085 :     of the existing .cm-files are supposed to be backward compatible
1086 :     with 110.0.x.)
1087 :    
1088 :     5. Some cleanup in stand-alone programs. (Don't use "exnMessage" -- use
1089 :     "General.exnMessage"! The former relies on a certain hook to be
1090 :     initialized, and that often does not happen in the stand-alone case.)
1091 :    
1092 :     ----------------------------------------------------------------------
1093 : george 984 Name: Lal George
1094 :     Date: 2001/11/21 13:56:18 EST
1095 :     Tag: george-2001121-pseudo-ops
1096 :     Description:
1097 :    
1098 :     Implemented a complete redesign of MLRISC pseudo-ops. Now there
1099 :     ought to never be any question of incompatabilities with
1100 :     pseudo-op syntax expected by host assemblers.
1101 :    
1102 :     For now, only modules supporting GAS syntax are implemented
1103 :     but more should follow, such as MASM, and vendor assembler
1104 :     syntax, e.g. IBM as, Sun as, etc.
1105 :    
1106 :     ----------------------------------------------------------------------
1107 : blume 977 Name: Matthias Blume
1108 :     Date: 2001/11/14 11:52:00 EST
1109 :     Tag: blume-20011114-srcname
1110 :     Description:
1111 :    
1112 :     1. Routed the name of the current source file to mlriscgen where it
1113 :     should be directly emitted into the code object. (This last part
1114 :     is yet to be done.)
1115 :    
1116 :     2. Some cleanup of the pgraph code to make it match the proposal that
1117 :     I put out the other day. (The proposal notwithstanding, things are
1118 :     still in flux here.)
1119 :    
1120 :     ----------------------------------------------------------------------
1121 : george 976 Name: Lal George
1122 :     Date: 2001/11/14 09:44:04 EST
1123 :     Tag:
1124 :     Description:
1125 :    
1126 :     Fix for a backpatching bug reported by Allen.
1127 :    
1128 :     Because the boundary between short and long span-dependent
1129 :     instructions is +/- 128, there are an astounding number of
1130 :     span-dependent instructions whose size is over estimated.
1131 :    
1132 :     Allen came up with the idea of letting the size of span
1133 :     dependent instructions be non-monotonic, for a maxIter
1134 :     number of times, after which the size must be monotonically
1135 :     increasing.
1136 :    
1137 :     This table shows the number of span-dependent instructions
1138 :     whose size was over-estimated as a function of maxIter, for the
1139 :     file Parse/parse/ml.grm.sml:
1140 :    
1141 :     maxIter # of instructions:
1142 :     10 687
1143 :     20 438
1144 :     30 198
1145 :     40 0
1146 :    
1147 :     In compiling the compiler, there is no significant difference in
1148 :     compilation speed between maxIter=10 and maxIter=40. Actually,
1149 :     my measurements showed that maxIter=40 was a tad faster than
1150 :     maxIter=10! Also 96% of the files in the compiler reach a fix
1151 :     point within 13 iterations, so fixing maxIter at 40, while high,
1152 :     is okay.
1153 :    
1154 :     ----------------------------------------------------------------------
1155 : blume 975 Name: Matthias Blume
1156 :     Date: 2001/10/31 15:25:00 EST
1157 :     Tag: blume-20011031-pgraph
1158 :     Description:
1159 :    
1160 :     CKIT:
1161 :     * Changed the "Function" constructor of type Ast.ctype to carry optional
1162 :     argument identifiers.
1163 :     * Changed the return type of TypeUtil.getFunction accordingly.
1164 :     * Type equality ignores the argument names.
1165 :     * TypeUtil.composite tries to preserve argument names but gives up quickly
1166 :     if there is a mismatch.
1167 :    
1168 :     installation script:
1169 :     * attempts to use "curl" if available (unless "wget" is available as well)
1170 :    
1171 :     CM:
1172 :     * has an experimental implementation of "portable graphs" which I will
1173 :     soon propose as an implementation-independent library format
1174 :     * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
1175 :    
1176 :     NLFFI-LIB:
1177 :     * some cleanup (all cosmetic)
1178 :    
1179 :     NLFFIGEN:
1180 :     * temporarily disabled the mechanism that suppresses ML output for
1181 :     C definitions whose identifiers start with an underscore character
1182 :     * generate val bindings for enum constants
1183 :     * user can request that only one style (light or heavy) is being used;
1184 :     default is to use both (command-line arguments: -heavy and -light)
1185 :     * fixed bug in handling of function types involving incomplete pointers
1186 :     * generate ML entry points that take record arguments (i.e., using
1187 :     named arguments) for C functions that have a prototype with named
1188 :     arguments
1189 :     (see changes to CKIT)
1190 :    
1191 :     ----------------------------------------------------------------------
1192 : leunga 972 Name: Allen Leung
1193 :     Date: 2001/10/27 20:34:00 EDT
1194 :     Tag: leunga-20011027-x86-fast-fp-call
1195 :     Description:
1196 :    
1197 :     Fixed the bug described in blume-20010920-slowfp.
1198 :    
1199 :     The fix involves
1200 :     1. generating FCOPYs in FSTP in ia32-svid
1201 :     2. marking a CALL with the appropriate annotation
1202 :    
1203 :     ----------------------------------------------------------------------
1204 : blume 961 Name: Matthias Blume
1205 :     Date: 2001/10/16 11:32:00 EDT
1206 :     Tag: blume-20011016-netbsd
1207 :     Description:
1208 :    
1209 :     Underscore patch from Chris Richards (fixing problem with compiling
1210 :     runtime system under recent NetBSD).
1211 :    
1212 :     ----------------------------------------------------------------------
1213 : george 959 Name: Allen Leung
1214 :     Date: 2001/10/12 17:18:32 EDT 2001
1215 :     Tag: leung-20011012-x86-printflowgraph
1216 :     Description:
1217 :    
1218 :     X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
1219 :    
1220 :     ----------------------------------------------------------------------
1221 : george 952 Name: Lal George
1222 : george 958 Date: 2001/10/11 23:51:34 EDT
1223 :     Tag: george-20011011-too-many-instrs
1224 :     Description:
1225 :    
1226 :     The representation of a program point never expected to see more
1227 :     than 65536 instructions in a basic block!
1228 :    
1229 :     ----------------------------------------------------------------------
1230 :     Name: Lal George
1231 : george 952 Date: 2001/10/09 09:41:37 EDT
1232 :     Tag: george-20011008-mlrisc-labels
1233 :     Description:
1234 :    
1235 :     Changed the machine description files to support printing of
1236 :     local and global labels in assembly code, based on host assembler
1237 :     conventions.
1238 :    
1239 :     ----------------------------------------------------------------------
1240 : blume 916 Name: Matthias Blume
1241 : blume 939 Date: 2001/09/25 15:25:00 EDT
1242 :     Tag: blume-20010925-exninfo
1243 :     Description:
1244 :    
1245 :     I provided a non-hook implementation of exnName (at the toplevel) and
1246 :     made the "dummy" implementation of exnMessage (at the toplevel) more
1247 :     useful: if nothing gets "hooked in", then at least you are going to
1248 :     see the exception name and a message indicating why you don't see more.
1249 :    
1250 :     [For the time being, programs that need exnMessage and want to use
1251 :     ml-build should either use General.exnMessage (strongly recommended) or
1252 :     refer to structure General at some other point so that CM sees a
1253 :     static dependency.]
1254 :    
1255 :     [Similar remarks go for "print" and "use": If you want to use their
1256 :     functionality in stand-alone programs generated by ml-build, then use
1257 :     TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
1258 :    
1259 :     ----------------------------------------------------------------------
1260 :     Name: Matthias Blume
1261 : blume 938 Date: 2001/09/20 17:28:00 EDT
1262 :     Tag: blume-20010920-slowfp
1263 :     Description:
1264 :    
1265 :     Allen says that x86-fast-fp is not safe yet, so I turned it off again...
1266 :    
1267 :     ----------------------------------------------------------------------
1268 :     Name: Matthias Blume
1269 : blume 937 Date: 2001/09/20 17:20:00 EDT
1270 :     Tag: blume-20010920-canonicalpaths
1271 :     Description:
1272 :    
1273 :     0. Updated the BOOT file (something that I forgot to do earlier).
1274 :    
1275 :     1. Small internal change to CM so that it avoids "/../" in filenames
1276 :     as much as possible (but only where it is safe).
1277 :    
1278 :     2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
1279 :     that arguments that contain delimiters are passed through correctly.
1280 :     This change also means that all "special" arguments of the form
1281 :     @SMLxxx... must come first.
1282 :    
1283 :     3. Changed install script to put relative anchor names for tool commands
1284 :     into pathconfig.
1285 :    
1286 :     ----------------------------------------------------------------------
1287 :     Name: Matthias Blume
1288 : blume 932 Date: 2001/09/18 15:35:00 EDT
1289 :     Tag: blume-20010918-readme11036
1290 :     Description:
1291 :    
1292 :     Added README files.
1293 :    
1294 :     ----------------------------------------------------------------------
1295 :     Name: Matthias Blume
1296 : blume 929 Date: 2001/09/18 11:45:00 EDT
1297 :     Tag: Release_110_36 (retag)
1298 :     Description:
1299 :    
1300 :     Fixed mistake in config/preloads. Retagged as 110.36.
1301 :    
1302 :     ----------------------------------------------------------------------
1303 :     Name: Matthias Blume
1304 : blume 928 Date: 2001/09/18 09:40:00 EDT
1305 : blume 929 Tag: Release_110_36_orig (tag changed)
1306 : blume 928 Description:
1307 :    
1308 :     New version (110.36). New bootfiles.
1309 :    
1310 :     ----------------------------------------------------------------------
1311 :     Name: Matthias Blume
1312 : blume 927 Date: 2001/09/14 16:15:00 EDT
1313 :     Tag: blume-20010914-x86fastfp
1314 :     Description:
1315 :    
1316 :     John committed some changes that Allen made, in particular a (hopefully)
1317 :     correctly working version of the x86-fp module.
1318 :    
1319 :     I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
1320 :     flag to "true". Everything seems to compile to a fixpoint ok, and
1321 :     "mandelbrot" speeds up by about 15%.
1322 :    
1323 :     ----------------------------------------------------------------------
1324 :     Name: Matthias Blume
1325 : blume 923 Date: 2001/09/13 11:20:00 EDT
1326 :     Tag: blume-20010913-minimal
1327 :     Description:
1328 :    
1329 :     1. Stefan Monnier's patch to fix a miscompilation problem that
1330 :     was brought to light by John Reppy's work on Moby.
1331 :    
1332 :     2. Implemented a minimal "structure Compiler" that contains just
1333 :     "version" and "architecture". The minimal version will be
1334 :     available when the full version is not. This is for backward-
1335 :     compatibility with code that wants to test Compiler.version.
1336 :    
1337 :     ----------------------------------------------------------------------
1338 :     Name: Matthias Blume
1339 : blume 920 Date: 2001/08/28 14:03:00 EDT
1340 :     Tag: blume-20010828-ml-lex
1341 :     Description:
1342 :    
1343 :     Fix for bug 1581, received from Neophytos Michael.
1344 :    
1345 :     ----------------------------------------------------------------------
1346 :     Name: Matthias Blume
1347 : blume 918 Date: 2001/08/27 11:20:00 EDT
1348 :     Tag: blume-20010827-readme11035
1349 :     Description:
1350 :    
1351 :     Fleshed out the README file for 110.35.
1352 :    
1353 :     ----------------------------------------------------------------------
1354 :     Name: Matthias Blume
1355 : blume 916 Date: 2001/08/24 17:10:00 EDT
1356 :     Tag: Release_110_35
1357 :     Description:
1358 :    
1359 :     New version number (110.35). New bootfiles.
1360 :    
1361 :     ----------------------------------------------------------------------
1362 : george 915 Name: Lal George
1363 : george 909 Date: 2001/08/24 13:47:18 EDT 2001
1364 :     Tag: george-20010824-MLRISC-graphs
1365 :     Description:
1366 :    
1367 :     removed clusters from MLRISC completely and replaced with graphs.
1368 :    
1369 :     ----------------------------------------------------------------------
1370 :     Name: Matthias Blume
1371 : blume 905 Date: 2001/08/23 17:50:00 EDT
1372 :     Tag: blume-20010823-toplevel
1373 :     Description:
1374 :    
1375 :     - some reorganization of the code that implements various kinds of
1376 :     environments in the compiler (static, dynamic, symbolic, combined)
1377 :     - re-implemented the EnvRef module so that evalStream works properly
1378 :     (if the stream contains references to "use", "CM.make", etc.)
1379 :     - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
1380 :    
1381 :     ----------------------------------------------------------------------
1382 :     Name: Matthias Blume
1383 : blume 904 Date: 2001/08/20 15:50 EDT
1384 :     Tag: blume20010820-slipup
1385 :     Description:
1386 :    
1387 :     I forgot to commit a few files. Here they are...
1388 :    
1389 :     ----------------------------------------------------------------------
1390 :     Name: Matthias Blume
1391 : blume 903 Date: 2001/08/20 15:35:00 EDT
1392 :     Tag: blume-20010820-debugprof
1393 :     Description:
1394 :    
1395 :     !!!! NEW BOOTFILES !!!!
1396 :    
1397 :     This is another round of reorganizing the compiler sources. This
1398 :     time the main goal was to factor out all the "instrumentation"
1399 :     passes (for profiling and backtracing) into their own library.
1400 :     The difficulty was to do it in such a way that it does not depend
1401 :     on elaborate.cm but only on elabdata.cm.
1402 :    
1403 :     Therefore there have been further changes to both elaborate.cm and
1404 :     elabdata.cm -- more "generic" things have been moved from the former
1405 :     to the latter. As a result, I was forced to split the assignment
1406 :     of numbers indicating "primtyc"s into two portions: SML-generic and
1407 :     SML/NJ-specific. Since it would have been awkward to maintain,
1408 :     I bit the bullet and actually _changed_ the mapping between these
1409 :     numbers and primtycs. The bottom line of this is that you need
1410 :     a new set of bin- and bootfiles.
1411 :    
1412 :     I have built new bootfiles for all architectures, so doing a fresh
1413 :     checkout and config/install.sh should be all you need.
1414 :    
1415 :     The newly created library's name is
1416 :    
1417 :     $smlnj/viscomp/debugprof.cm
1418 :    
1419 :     and its sources live under
1420 :    
1421 :     src/compiler/DebugProf
1422 :    
1423 :     ----------------------------------------------------------------------
1424 :     Name: Matthias Blume
1425 : blume 902 Date: 2001/08/15 17:15:00 EDT
1426 :     Tag: blume-20010815-compreorg
1427 :     Description:
1428 :    
1429 :     This is a first cut at reorganizing the CM libraries that make up the
1430 :     core of the compiler. The idea is to separate out pieces that could
1431 :     be used independently by tools, e.g., the parser, the typechecker, etc.
1432 :    
1433 :     The current status is a step in this direction, but it is not quite
1434 :     satisfactory yet. Expect more changes in the future.
1435 :    
1436 :     Here is the current (new) organization...
1437 :    
1438 :     What used to be $smlnj/viscomp/core.cm is now divided into
1439 :     six CM libraries:
1440 :    
1441 :     $smlnj/viscomp/basics.cm
1442 :     /parser.cm
1443 :     /elabdata.cm
1444 :     /elaborate.cm
1445 :     /execute.cm
1446 :     /core.cm
1447 :    
1448 :     The CM files for these libraries live under src/system/smlnj/viscomp.
1449 :     All these libraries are proxy libraries that contain precisely
1450 :     one CM library component. Here are the locations of the components
1451 :     (all within the src/compiler tree):
1452 :    
1453 :     Basics/basics.cm
1454 :     Parse/parser.cm
1455 :     ElabData/elabdata.cm
1456 :     Elaborator/elaborate.cm
1457 :     Execution/execute.cm
1458 :     core.cm
1459 :    
1460 :     [This organization is the same that has been used already
1461 :     for a while for the architecture-specific parts of the visible
1462 :     compiler and for the old version of core.cm.]
1463 :    
1464 :     As you will notice, many source files have been moved from their
1465 :     respective original locations to a new home in one of the above
1466 :     subtrees.
1467 :    
1468 :     The division of labor between the new libraries is the following:
1469 :    
1470 :     basics.cm:
1471 :     - Simple, basic definitions that pertain to many (or all) of
1472 :     the other libraries.
1473 :     parser.cm:
1474 :     - The SML parser, producing output of type Ast.dec.
1475 :     - The type family for Ast is also defined and exported here.
1476 :     elabdata.cm:
1477 :     - The datatypes that describe input and output of the elaborator.
1478 :     This includes types, absyn, and static environments.
1479 :     elaborator.cm:
1480 :     - The SML/NJ type checker and elaborator.
1481 :     This maps an Ast.dec (with a given static environment) to
1482 :     an Absyn.dec (with a new static environment).
1483 :     - This libraries implements certain modules that used to be
1484 :     structures as functors (to remove dependencies on FLINT).
1485 :     execute.cm:
1486 :     - Everything having to do with executing binary code objects.
1487 :     - Dynamic environments.
1488 :     core.cm:
1489 :     - SML/NJ-specific instantiations of the elaborator and MLRISC.
1490 :     - Top-level modules.
1491 :     - FLINT (this should eventually become its own library)
1492 :    
1493 :     Notes:
1494 :    
1495 :     I am not 100% happy with the way I separated the elaborator (and its
1496 :     data structures) from FLINT. Two instances of the same problem:
1497 :    
1498 :     1. Data structures contain certain fields that carry FLINT-specific
1499 :     information. I hacked around this using exn and the property list
1500 :     module from smlnj-lib. But the fact that there are middle-end
1501 :     specific fields around at all is a bit annoying.
1502 :    
1503 :     2. The elaborator calculates certain FLINT-related information. I tried
1504 :     to make this as abstract as I could using functorization, but, again,
1505 :     the fact that the elaborator has to perform calculations on behalf
1506 :     of the middle-end at all is not nice.
1507 :    
1508 :     3. Having to used exn and property lists is unfortunate because it
1509 :     weakens type checking. The other alternative (parameterizing
1510 :     nearly *everything*) is not appealing, though.
1511 :    
1512 :     I removed the "rebinding =" warning hack because due to the new organization
1513 :     it was awkward to maintain it. As a result, the compiler now issues some of
1514 :     these warnings when compiling init.cmi during bootstrap compilation. On
1515 :     the plus side, you also get a warning when you do, for example:
1516 :     val op = = Int32.+
1517 :     which was not the case up to now.
1518 :    
1519 :     I placed "assign" and "deref" into the _Core structure so that the
1520 :     code that deals with the "lazy" keyword can find them there. This
1521 :     removes the need for having access to the primitive environment
1522 :     during elaboration.
1523 :    
1524 :     ----------------------------------------------------------------------
1525 :     Name: Matthias Blume
1526 : blume 898 Date: 2001/08/13
1527 :     Tag: blume-20010813-closures
1528 :     Description:
1529 :    
1530 :     This fix was sent to us by Zhong Shao. It is supposed to improve the
1531 :     performance of certain loops by avoiding needless closure allocation.
1532 :    
1533 :     ----------------------------------------------------------------------
1534 : george 890 Name: Lal George
1535 : george 896 Date: 2001/07/31 10:03:23 EDT 2001
1536 :     Tag: george-20010731-x86-fmalloc
1537 :     Description: Fixed bug in x86 calls
1538 :    
1539 :     There was a bug where call instructions would mysteriously
1540 :     vanish. The call instruction had to be one that returned
1541 :     a floating point value.
1542 :    
1543 :     ----------------------------------------------------------------------
1544 :     Name: Lal George
1545 : george 890 Date: 2001/07/19 16:36:29 EDT 2001
1546 :     Tag: george-20010719-simple-cells
1547 :     Description:
1548 :    
1549 :     I have dramatically simplified the interface for CELLS in MLRISC.
1550 :    
1551 :     In summary, the cells interface is broken up into three parts:
1552 :    
1553 :     1. CellsBasis : CELLS_BASIS
1554 :    
1555 :     CellsBasis is a top level structure and common for all
1556 :     architectures. it contains the definitions of basic datatypes
1557 :     and utility functions over these types.
1558 :    
1559 :     2. functor Cells() : CELLS
1560 :    
1561 :     Cells generates an interface for CELLS that incorporates the
1562 :     specific resources on the target architecture, such as the
1563 :     presence of special register classes, their number and size,
1564 :     and various useful substructures.
1565 :    
1566 :     3. <ARCH>CELLS
1567 :    
1568 :     e.g. SparcCells: SPARCCELLS
1569 :    
1570 :     <ARCH>CELLS usually contains additional bindings for special
1571 :     registers on the architecture, such as:
1572 :    
1573 :     val r0 : cell (* register zero *)
1574 :     val y : cell (* Y register *)
1575 :     val psr : cell (* processor status register *)
1576 :     ...
1577 :    
1578 :     The structure returned by applying the Cells functor is opened
1579 :     in this interface.
1580 :    
1581 :     The main implication of all this is that the datatypes for cells is
1582 :     split between CellsBasis and CELLS -- a fairly simple change for user
1583 :     code.
1584 :    
1585 :     In the old scheme the CELLS interface had a definitional binding of
1586 :     the form:
1587 :    
1588 :     signature CELLS = sig
1589 :    
1590 :     structure CellsBasis = CellsBasis
1591 :    
1592 :     ...
1593 :    
1594 :     end
1595 :    
1596 :     With all the sharing constraints that goes on in MLRISC, this old
1597 :     design quickly leads to errors such as:
1598 :    
1599 :     "structure definition spec inside of sharing ... "
1600 :    
1601 :    
1602 :     and appears to require an unacceptable amount of sharing and where
1603 :     constraint hackery.
1604 :    
1605 :     I think this error message (the interaction of definitional specs and
1606 :     sharing) requires more explanation on our web page.
1607 :    
1608 :     ----------------------------------------------------------------------
1609 : blume 826 Name: Matthias Blume
1610 : blume 879 Date: 2001/07/19 15:00:00 EDT
1611 :     Tag: blume-20010719-libreorg
1612 :     Description:
1613 :    
1614 :     This update puts together a fairly extensive but straightforward change
1615 :     to the way the libraries that implement the interactive system are
1616 :     organized:
1617 :    
1618 :     The biggest change is the elimination of structure Compiler. As a
1619 :     replacement for this structure, there is now a CM library
1620 :     (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
1621 :     that exports all the substructures of the original structure Compiler
1622 :     directly. So instead of saying Compiler.Foo.bar one now simply
1623 :     says Foo.bar. (The CM libraries actually export a collection of
1624 :     structures that is richer than the collection of substructures of
1625 :     structure Compiler.)
1626 :    
1627 :     To make the transition smooth, there is a separate library called
1628 :     $smlnj/compiler/compiler.cm which puts together and exports the
1629 :     original structure Compiler (or at least something very close to it).
1630 :    
1631 :     There are five members of the original structure Compiler
1632 :     that are not exported directly but which instead became members
1633 :     of a new structure Backend (described by signature BACKEND). These are:
1634 :     structure Profile (: PROFILE), structure Compile (: COMPILE), structure
1635 :     Interact (: INTERACT), structure Machine (: MACHINE), and val
1636 :     architecture (: string).
1637 :    
1638 :     Structure Compiler.Version has become structure CompilerVersion.
1639 :    
1640 :     Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
1641 :     by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
1642 :     or x86, respectively.
1643 :     Each of these exports the same frontend structures that
1644 :     $smlnj/compiler.cm exports. But they do not have a structure Backend
1645 :     and instead export some structure <Arch>Backend where <Arch> is Alpha32,
1646 :     Hppa, PPC, Sparc, or X86, respectively.
1647 :    
1648 :     Library $smlnj/compiler/all.cm exports the union of the exports of
1649 :     $smlnj/compiler/<arch>.cm
1650 :    
1651 :     There are no structures <Arch>Compiler anymore, use
1652 :     $smlnj/compiler/<arch>.cm instead.
1653 :    
1654 :     Library host-compiler-0.cm is gone. Instead, the internal library
1655 :     that instantiates CM is now called cm0.cm. Selection of the host
1656 :     compiler (backend) is no longer done here but. (Responsibility for it
1657 :     now lies with $smlnj/compiler/current.cm. This seems to be more
1658 :     logical.)
1659 :    
1660 :     Many individual files have been moved or renamed. Some files have
1661 :     been split into multiple files, and some "dead" files have been deleted.
1662 :    
1663 :     Aside from these changes to library organization, there are also changes
1664 :     to the way the code itself is organized:
1665 :    
1666 :     Structure Binfile has been re-implemented in such a way that it no
1667 :     longer needs any knowledge of the compiler. It exclusively deals
1668 :     with the details of binfile layout. It no longer invokes the
1669 :     compiler (for the purpose of creating new prospective binfile
1670 :     content), and it no longer has any knowledge of how to interpret
1671 :     pickles.
1672 :    
1673 :     Structure Compile (: COMPILE) has been stripped down to the bare
1674 :     essentials of compilation. It no longer deals with linking/execution.
1675 :     The interface has been cleaned up considerably.
1676 :    
1677 :     Utility routines for dealing with linking and execution have been
1678 :     moved into their own substructures.
1679 :    
1680 :     (The ultimate goal of these changes is to provide a light-weight
1681 :     binfile loader/linker (at least for, e.g., stable libraries) that
1682 :     does not require CM or the compiler to be present.)
1683 :    
1684 :     CM documentation has been updated to reflect the changes to library
1685 :     organization.
1686 :    
1687 :     ----------------------------------------------------------------------
1688 :     Name: Matthias Blume
1689 : blume 875 Date: 2001/07/10 17:30:00 EDT
1690 :     Tag: Release_110_34
1691 :     Description:
1692 :    
1693 : blume 876 Minor tweak to 110.34 (re-tagged):
1694 :    
1695 :     - README.html file added to CVS repository
1696 :     - runtime compiles properly under FreeBSD 3.X and 4.X
1697 :    
1698 :     ----------------------------------------------------------------------
1699 :     Name: Matthias Blume
1700 :     Date: 2001/07/10 17:30:00 EDT
1701 :     Tag: Release_110_34
1702 :     Description:
1703 :    
1704 : blume 875 New version number (110.34). New bootfiles.
1705 :    
1706 :     ----------------------------------------------------------------------
1707 :     Name: Matthias Blume
1708 : blume 874 Date: 2001/07/09 16:00:00 EDT
1709 :     Tag: blume-20010709-more-varargs
1710 :     Description:
1711 :    
1712 :     I changed the handling of varargs in ml-nlffigen again:
1713 :     The ellipsis ... will now simply be ignored (with an accompanying warning).
1714 :    
1715 :     The immediate effect is that you can actually call a varargs function
1716 :     from ML -- but you can't actually supply any arguments beyond the ones
1717 :     specified explicitly. (For example, you can call printf with its format
1718 :     string, but you cannot pass additional arguments.)
1719 :    
1720 :     This behavior is only marginally more useful than the one before, but
1721 :     it has the advantage that a function or, more importantly, a function
1722 :     type never gets dropped on the floor, thus avoiding follow-up problems with
1723 :     other types that refer to the offending one.
1724 :    
1725 :     ----------------------------------------------------------------------
1726 :     Name: Matthias Blume
1727 : blume 873 Date: 2001/07/09 11:25:00 EDT
1728 :     Tag: blume-20010709-varargs
1729 :     Description:
1730 :    
1731 :     1. ckit-lib.cm now exports structure Error
1732 :     2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
1733 :     with a warning accompanied by a source location. Moreover, it
1734 :     merely skips the offending function or type and proceeds with the
1735 :     rest of its work.u As a result, one can safely feed C code containing
1736 :     "..." to ml-nlffigen.
1737 :     3. There are some internal improvements to CM, providing slightly
1738 :     more general string substitutions in the tools subsystem.
1739 :    
1740 :     ----------------------------------------------------------------------
1741 :     Name: Matthias Blume
1742 : blume 854 Date: 2001/06/27 15:10:00 EDT
1743 :     Tag: blume-20010627-concur
1744 :     Description:
1745 :    
1746 :     Fixed a small bug in CM's handling of parallel compilation.
1747 :     (You could observe the bug by Control-C-interrupting an ordinary
1748 :     CMB.make or CM.stabilize and then attaching some compile servers.
1749 :     The result was that all of a sudden the previously interrupted
1750 :     compilation would continue on its own. This was because of
1751 :     an over-optimization: CM did not bother to clean out certain queues
1752 :     when no servers were attached "anyway", resulting in the contents
1753 :     of these queues to grab control when new servers did get attached.)
1754 :    
1755 :     There is also another minor update to the CM manual.
1756 :    
1757 :     ----------------------------------------------------------------------
1758 :     Name: Matthias Blume
1759 : blume 853 Date: 2001/06/26 16:15:00 EDT
1760 :     Tag: blume-20010626-cmdoc
1761 :     Description:
1762 :    
1763 :     Minor typo fixed in CM manual (syntax diagram for libraries).
1764 :    
1765 :     ----------------------------------------------------------------------
1766 :     Name: Matthias Blume
1767 : blume 852 Date: 2001/06/25 22:55:00 EDT
1768 :     Tag: blume-20010625-x86pc
1769 :     Description:
1770 :    
1771 :     Fixed a nasty bug in the X86 assembly code that caused signal
1772 :     handlers to fail (crash) randomly.
1773 :    
1774 :     ----------------------------------------------------------------------
1775 :     Name: Matthias Blume
1776 : blume 846 Date: 2001/06/25 12:05:00 EDT
1777 :     Tag: blume-20010625-nlffigen
1778 :     Description:
1779 :    
1780 :     This update fixes a number of minor bugs in ml-nlffigen as reported by
1781 :     Nick Carter <nbc@andrew.cmu.edu>.
1782 :    
1783 :     1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
1784 :     2. Default names for generated files are now derived from the name of
1785 :     the C file *without its directory*. In particular, this causes generated
1786 :     files to be placed locally even if the C file is in some system directory.
1787 :     3. Default names for generated signatures and structures are also derived
1788 :     from the C file name without its directory. This avoids silly things
1789 :     like "structure GL/GL".
1790 :     (Other silly names are still possible because ml-nlffigen does not do
1791 : blume 847 a thorough check of whether generated names are legal ML identifiers.
1792 :     When in doubt, use command line arguments to force particular names.)
1793 : blume 846
1794 :     ----------------------------------------------------------------------
1795 :     Name: Matthias Blume
1796 : blume 845 Date: 2001/06/21 12:25:00 EDT
1797 :     Tag: blume-20010621-eXene
1798 :     Description:
1799 :    
1800 :     eXene now compiles and (sort of) works again.
1801 :    
1802 :     The library name (for version > 110.33) is $/eXene.cm.
1803 :    
1804 :     I also added an new example in src/eXene/examples/nbody. See the
1805 :     README file there for details.
1806 :    
1807 :     ----------------------------------------------------------------------
1808 :     Name: Matthias Blume
1809 : blume 844 Date: 2001/06/20 16:40:00 EDT
1810 :     Tag: blume-20010620-cml
1811 :     Description:
1812 :    
1813 :     CML now compiles and works again.
1814 :    
1815 :     Libraries (for version > 110.33):
1816 :    
1817 :     $cml/cml.cm Main CML library.
1818 :     $cml/basis.cm CML's version of $/basis.cm.
1819 :     $cml/cml-internal.cm Internal helper library.
1820 :     $cml/core-cml.cm Internal helper library.
1821 :     $cml-lib/trace-cml.cm Tracing facility.
1822 :     $cml-lib/smlnj-lib.cm CML's version of $/smlnj-lib.cm
1823 :    
1824 :     The installer (config/install.sh) has been taught how to properly
1825 :     install this stuff.
1826 :    
1827 :     ----------------------------------------------------------------------
1828 :     Name: Matthias Blume
1829 : blume 843 Date: 2001/06/19 17:55:00 EDT
1830 :     Tag: blume-20010619-instantiate
1831 :     Description:
1832 :    
1833 :     This un-breaks the fix for bug 1432.
1834 :     (The bug was originally fixed in 110.9 but I broke it again some
1835 :     time after that.)
1836 :    
1837 :     ----------------------------------------------------------------------
1838 :     Name: Matthias Blume
1839 : blume 842 Date: 2001/06/19 17:25:00 EDT
1840 :     Tag: blume-20010619-signals
1841 :     Description:
1842 :    
1843 :     This should (hopefully) fix the long-standing signal handling bug.
1844 :     (The runtime system was constructing a continuation record with an
1845 :     incorrect descriptor which would cause the GC to drop data on the floor...)
1846 :    
1847 :     ----------------------------------------------------------------------
1848 :     Name: Matthias Blume
1849 : blume 840 Date: 2001/06/15 15:05:00 EDT
1850 : blume 841 Tag: blume-20010615-moresparc
1851 :     Description:
1852 :    
1853 :     Here is a short late-hour update related to Sparc c-calls:
1854 :    
1855 :     -- made handling of double-word arguments a bit smarter
1856 :    
1857 :     -- instruction selection phase tries to collapse certain clumsily
1858 :     constructed ML-Trees; typical example:
1859 :    
1860 :     ADD(ty,ADD(_,e,LI d1),LI d2) -> ADD(ty,e,LI(d1+d2))
1861 :    
1862 :     This currently has no further impact on SML/NJ since mlriscGen does
1863 :     not seem to generate such patterns in the first place, and c-calls
1864 :     (which did generate them in the beginning) has meanwhile been fixed
1865 :     so as to avoid them as well.
1866 :    
1867 :     ----------------------------------------------------------------------
1868 :     Name: Matthias Blume
1869 :     Date: 2001/06/15 15:05:00 EDT
1870 : blume 840 Tag: blume-20010615-sparc
1871 :     Description:
1872 :    
1873 :     The purpose of this update is to provide an implementation of NLFFI
1874 :     on Sparc machines.
1875 :    
1876 :     Here are the changes in detail:
1877 :    
1878 :     * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
1879 :     the Sparc implementation of the c-calls API.
1880 :     * The Sparc backend of SML/NJ has been modified to uniformely use %fp
1881 :     for accessing the ML frame. Thus, we have a real frame pointer and
1882 :     can freely modify %sp without need for an omit-frame-ptr phase.
1883 :     The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
1884 :     this case.
1885 :     * ml-nlffigen has been taught to produce code for different architectures
1886 :     and calling conventions.
1887 :     * In a way similar to what was done in the x86 case, the Sparc
1888 :     backend uses its own specific extension to mltree. (For example,
1889 :     it needs to be able to generate UNIMP instructions which are part
1890 :     of the calling convention.)
1891 :     * ml-nlffi-lib was reorganized to make it more modular (in particular,
1892 :     to make it easier to plug in new machine- and os-dependent parts).
1893 :    
1894 :     There are some other fairly unrelated bug fixes and cleanups as well:
1895 :    
1896 :     * I further hacked the .cm files for MLRISC tools (like MDLGen) so
1897 :     that they properly share their libraries with existing SML/NJ libraries.
1898 :     * I fixed a minor cosmetic bug in CM, supressing certain spurious
1899 :     follow-up error messages.
1900 :     * Updates to CM/CMB documentation.
1901 :    
1902 :     TODO items:
1903 :    
1904 :     * MLRISC should use a different register as its asmTemp on the Sparc.
1905 :     (The current %o2 is a really bad choice because it is part of the
1906 :     calling conventions, so things might interfere in unexpected ways.)
1907 :    
1908 :     ----------------------------------------------------------------------
1909 :     Name: Matthias Blume
1910 : blume 839 Date: 2001/06/07
1911 :     Tag: blume-20010607-calls
1912 :     Description:
1913 :    
1914 :     A number of internal changes related to C calls and calling conventions:
1915 :    
1916 :     1. ML-Tree CALL statements now carry a "pops" field. It indicates the
1917 :     number of bytes popped implicitly (by the callee). In most cases
1918 :     this field is 0 but on x86/win32 it is some non-zero value. This
1919 :     is information provided for the benefit of the "omit-frameptr" pass.
1920 :     2. The CALL instruction on the x86 carries a similar "pops" field.
1921 :     The instruction selection phase copies its value from the ML-Tree
1922 :     CALL statement.
1923 :     3. On all other architectures, the instruction selection phase checks
1924 :     whether "pops=0" and complains if not.
1925 :     4. The c-calls implementation for x86 now accepts two calling conventions:
1926 :     "ccall" and "stdcall". When "ccall" is selected, the caller cleans
1927 :     up after the call and pops is set to 0. For "stdcall", the caller
1928 :     does nothing, leaving the cleanup to the callee; pops is set to
1929 :     the number of bytes that were pushed onto the stack.
1930 :     5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1931 :     distinguish between "ccall" and "stdcall".
1932 :     6. The UNIMP instruction has been added to the supported Sparc instruction
1933 :     set. (This is needed for implementing the official C calling convention
1934 :     on this architecture.)
1935 :     7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1936 :     work with the latest CM.
1937 :    
1938 :     ----------------------------------------------------------------------
1939 :     Name: Matthias Blume
1940 : blume 838 Date: 2001/06/05 15:10:00 EDT
1941 :     Tag: blume-20010605-cm-index
1942 :     Description:
1943 :    
1944 :     0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1945 :    
1946 :     1. CM can now generate "index files". These are human-readable files
1947 :     that list on a per-.cm-file basis each toplevel symbol defined or
1948 :     imported. The location of the index file for
1949 :     <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1950 :     To enable index-file generation, set CM.Control.generate_index to true
1951 :     or export an environment-symbol: export CM_GENERATE_INDEX=true.
1952 :    
1953 :     The CM manual has been updated accordingly.
1954 :    
1955 :     2. I made some slight modifications to the c-calls API in MLRISC.
1956 :    
1957 :     a) There is now a callback to support saving/restoring of
1958 :     dedicated but caller-save registers around the actual call
1959 :     instruction.
1960 :     b) One can optionally specify a comment-annotation for the
1961 :     call instruction.
1962 :    
1963 :     3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1964 :     (For example, the comment annotation shows the C prototype of
1965 :     the function being called.)
1966 :    
1967 :     ----------------------------------------------------------------------
1968 :     Name: Matthias Blume
1969 : blume 837 Date: 2001/06/01 13:30:00 EDT
1970 :     Tag: blume-20010601-nlffi-cleanup
1971 :     Description:
1972 :    
1973 :     This is mostly a cleanup of MLFFI stuff:
1974 :    
1975 :     - some signature files have been put into a more exposed place
1976 :     - the ugly 'f type parameter is gone (simplifies types tremendously!)
1977 :     - ml-nlffigen changed accordingly
1978 :     - tutorial updated
1979 :    
1980 :     Other changes:
1981 :    
1982 :     - author's affiliation in CM manual(s) updated
1983 :     - some more recognized keywords added to Allen's sml.sty
1984 :    
1985 :     ----------------------------------------------------------------------
1986 :     Name: Matthias Blume
1987 : blume 836 Date: 2001/05/25 15:30:00 EDT
1988 :     Tag: blume-20010525-iptr
1989 :     Description:
1990 :    
1991 :     - put the official 110.33-README (as it appears on the ftp server) under
1992 :     CVS
1993 :     - fixed a small bug related to incomplete pointer types in
1994 :     ml-nlffigen
1995 :     - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1996 :     (it does not need the 'f type parameter)
1997 :    
1998 :     ----------------------------------------------------------------------
1999 :     Name: Matthias Blume
2000 : blume 834 Date: 2001/05/23 14:30:00 EDT
2001 :     Tag: Release_110_33
2002 :     Description:
2003 :    
2004 :     New version number (110.33). New bootfiles.
2005 :    
2006 :     ----------------------------------------------------------------------
2007 :     Name: Matthias Blume
2008 : blume 833 Date: 2001/05/22 18:06:00 EDT
2009 :     Tag: blume-20010522-targets
2010 :     Description:
2011 :    
2012 :     Made install.sh use file config/targets.customized if it exists, falling
2013 :     back to config/targets if it doesn't. This way one can have a customized
2014 :     version of the targets file without touching the "real thing", thus
2015 :     eliminating the constant fear of accidentally checking something bogus
2016 :     back into the CVS repository... (File config/targets.customized must
2017 :     not be added to the repository!)
2018 :    
2019 :     ----------------------------------------------------------------------
2020 :     Name: Matthias Blume
2021 : blume 832 Date: 2001/05/22 16:30:00 EDT
2022 :     Tag: blume-20010522-minitut
2023 :     Description:
2024 :    
2025 :     1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
2026 :     struct returns.
2027 :     2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt. This is some very
2028 :     incomplete, preliminary documentation for NLFFI.
2029 :    
2030 :     ----------------------------------------------------------------------
2031 :     Name: Matthias Blume
2032 : blume 829 Date: 2001/05/14 11:30:00 EDT
2033 :     Tag: blume-20010514-script
2034 :     Description:
2035 :    
2036 :     Some bugs in install script fixed.
2037 :    
2038 :     In addition to that I also made a slight change to the NLFFI API:
2039 :     Functors generated by ml-nlffigen now take the dynamic library as a
2040 :     straight functor argument, not as a suspended one. (The original
2041 :     functor code used to force the suspension right away anyway, so there
2042 :     was nothing gained by this complication of the interface.)
2043 :    
2044 :     ----------------------------------------------------------------------
2045 :     Name: Matthias Blume
2046 : blume 828 Date: 2001/05/11 14:35:00 EDT
2047 :     Tag: blume-20010511-ml-nlffi
2048 :     Description:
2049 :    
2050 :     I finally took the plunge and added my new FFI code to the main
2051 :     repository. For x86-linux it is now ready for prime-time.
2052 :    
2053 :     There are two new subdirectories of "src":
2054 :    
2055 :     - ml-nlffi-lib:
2056 :     The utility library for programs using the FFI interface.
2057 :     Here is the implementation of $/c.cm and its associated low-level
2058 :     partners $/c-int.cm and $/memory.cm.
2059 :     - ml-nlffigen:
2060 :     A stand-alone program for generating ML glue code from C source
2061 :     code.
2062 :    
2063 :     Building ml-nlffigen requires $/ckit-lib.cm.
2064 :    
2065 :     The config/install.sh script has been updates to do the Right Thing
2066 :     (hopefully).
2067 :    
2068 :     Notice that the source tree for the C-Kit will not be put under "src"
2069 :     but directly under the installation root directory. (This is the
2070 :     structure that currently exists on the CVS server when you check out
2071 :     module "sml".) Fortunately, config/install.sh knows about this oddity.
2072 :    
2073 :     Bugs: No documentation yet.
2074 :    
2075 :     ----------------------------------------------------------------------
2076 :     Name: Matthias Blume
2077 : blume 826 Date: 2001/05/09 16:35:00 EDT
2078 :     Tag: blume-20010509-cpscontract
2079 :     Description:
2080 :    
2081 :     Fixed a bug in the accounting code in cpsopt/contract.sml. (The
2082 :     wrapper/unwrapper elimination did not decrement usage counts and some
2083 :     dead variables got overlooked by the dead-up logic.)
2084 :    
2085 :     ----------------------------------------------------------------------
2086 : george 824 Name: Lal George
2087 :     Date: 2001/05/08 17:26:09 EDT
2088 :     Tag: george-20010508-omit-frameptr
2089 :     Description:
2090 :    
2091 :     Changes to implement the omit-frame-pointer optimization to support
2092 :     raw C calls. For now, there is only support on the Intel x86, but
2093 :     other architectures will follow as more experience is gained with this.
2094 :    
2095 :    
2096 :     ----------------------------------------------------------------------
2097 : blume 818 Name: Matthias Blume
2098 : blume 819 Date: 2001/05/07 14:40:00 EDT
2099 :     Tag: blume-20010507-proxies
2100 :     Description:
2101 :    
2102 :     I made into "proxy libraries" all libraries that qualify for such a
2103 :     change. (A qualifying library is a library that has another library or
2104 :     groups as its sole member and repeats that member's export list
2105 :     verbatim. A proxy library avoids this repetition by omitting its export
2106 :     list, effectively inheriting the list that its (only) member exports.
2107 :     See the CM manual for more explanation.)
2108 :     The main effect is that explicit export lists for these libraries
2109 :     do not have to be kepts in sync, making maintenance a bit easier.
2110 :    
2111 :     I also added copyright notices to many .cm-files.
2112 :    
2113 :     Last but not least, I made a new set of bootfiles.
2114 :    
2115 :     ----------------------------------------------------------------------
2116 :     Name: Matthias Blume
2117 : blume 818 Date: 2001/05/04 17:00:00 EDT
2118 :     Tag: blume-20010504-cm-lsplit
2119 :     Description:
2120 :    
2121 :     0. John merged pending changes to $/smlnj-lib.cm
2122 :    
2123 :     1. Allen's previous change accidentally backed out of one of Lal's
2124 :     earlier changes. I undid this mistake (re-introducing Lal's change).
2125 :    
2126 :     2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
2127 :     within the compiler where applicable. There is some code simplification
2128 :     because of that.
2129 :    
2130 :     3. The "split" phase (in FLINT) is now part of the default list of phases.
2131 :     Compiler.Control.LambdaSplitting.* can be used to globally control the
2132 :     lambda-splitting (cross-module-inlining) engine. In addition to that,
2133 :     it can now also be controlled on a per-source basis: CM has been taught
2134 :     a new tool parameter applicable to ML source files.
2135 :    
2136 :     - To turn lambda-splitting off completely:
2137 :     local open Compiler.Control.LambdaSplitting in
2138 :     val _ = set Off
2139 :     end
2140 :     - To make "no lambda-splitting" the global default (but allow per-source
2141 :     overriding); this is the initial setting:
2142 :     local open Compiler.Control.LambdaSplitting in
2143 :     val _ = set (Default NONE)
2144 :     end
2145 :     - To make "lambda-splitting with aggressiveness a" the global default
2146 :     (and allow per-source overriding):
2147 :     local open Compiler.Control.LambdaSplitting in
2148 :     val _ = set (Default (SOME a))
2149 :     end
2150 :    
2151 :     - To turn lambda-splitting off for a given ML souce file (say: a.sml)
2152 :     write (in the respective .cm-file):
2153 :     a.sml (lambdasplitting:off)
2154 :     - To turn lambda-splitting for a.sml on with minimal aggressiveness:
2155 :     a.sml (lambdasplitting:on)
2156 :     - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
2157 :     <a> is a decimal non-negative integer):
2158 :     a.sml (lambdasplitting:<a>)
2159 :     - To turn lambda-splitting for a.sml on with maximal aggressiveness:
2160 :     a.sml (lambdasplitting:infinity)
2161 :     - To use the global default for a.sml:
2162 :     a.sml (lambdasplitting:default)
2163 :     or simply
2164 :     a.sml
2165 :    
2166 :     ----------------------------------------------------------------------
2167 : leunga 815 Name: Allen Leung
2168 :     Date: 2001/05/04 01:57:00 EDT
2169 :     Tag: leunga-20010504-sync
2170 :     Description:
2171 : leunga 788
2172 : leunga 815 MLRISC features.
2173 :    
2174 :     1. Fix to CMPXCHG instructions.
2175 :     2. Changed RA interface to allow annotations in callbacks.
2176 :     3. Added a new method to the stream interface to allow annotations updates.
2177 :    
2178 : george 749 ----------------------------------------------------------------------
2179 : blume 812 Name: Matthias Blume
2180 : blume 814 Date: 2001/05/01 11:45:00 EDT
2181 :     Tag: blume-20010501-pcedittmp
2182 :     Description:
2183 :    
2184 :     Changed install.sh to use the current working directory instead of
2185 :     /usr/tmp for a temporary file (pcedittmp). The previous choice
2186 :     of /usr/tmp caused trouble with MacOS X because of file premission
2187 :     problems.
2188 :    
2189 :     ----------------------------------------------------------------------
2190 :     Name: Matthias Blume
2191 : blume 812 Date: 2001/04/20 11:10:00 EDT
2192 :     Tag: blume-20010420-inMLflag
2193 :     Description:
2194 :    
2195 :     - added vp_limitPtrMask to vproc-state.h
2196 :     (for use by the raw-C-calls mechanism to implement proper interrupt
2197 :     handling)
2198 :     - made the ML compiler aware of various data-structure offsets so it
2199 :     can generate code for accessing the vp_inML flag and vp_limitPtrMask
2200 :     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
2201 :     raw C-calls
2202 :    
2203 :     ----------------------------------------------------------------------
2204 : george 810 Name: Lal George
2205 :     Date: 2001/04/20 09:15:28 EDT
2206 :     Tag: george-20010420-macosX
2207 :     Description:
2208 :    
2209 :     - Changes to port to Mac OS X; Darwin.
2210 :    
2211 :     - In the process I found that sqrt was broken on the PPC, because the
2212 :     fsqrt instruction is not implemented.
2213 :    
2214 :     ----------------------------------------------------------------------
2215 : blume 799 Name: Matthias Blume
2216 : blume 808 Date: 2001/04/18 12:45:00 EDT
2217 :     Tag: blume-20010418-ccalls
2218 :     Description:
2219 :    
2220 :     - fixed two off-by-4 errors in the x86-specific c-calls implementation
2221 :     (this bug prevented structure arguments containing pointers from being
2222 :     passed correctly)
2223 :     - changed the raw-C-call code in mlriscGen.sml in such a way that
2224 :     structure arguments are represented as a pointer to the beginning
2225 :     of the structure (instead of having a series of synthesized arguments,
2226 :     one for each structure member)
2227 :    
2228 :     - made makeml script's verbosity level configurable via environment
2229 :     variable (MAKEML_VERBOSITY)
2230 :    
2231 : blume 813 - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
2232 : blume 808 in rawmem-x86.sml; we are now using the real thing
2233 :    
2234 :     ----------------------------------------------------------------------
2235 :     Name: Matthias Blume
2236 : blume 806 Date: 2001/03/22 16:25:00 EST
2237 :     Tag: blume-20010322-bootfiles
2238 :     Description:
2239 :    
2240 :     Created a new set of bootfiles (for your automatic installation convenience).
2241 :    
2242 :     ----------------------------------------------------------------------
2243 :     Name: Matthias Blume
2244 : blume 805 Date: 2001/03/22 15:10:00 EST
2245 :     Tag: blume-20010322-rawmem-parcm
2246 :     Description:
2247 :    
2248 :     1. All "raw memory access" primitives for the new FFI are implemented now
2249 :     (at least on the x86).
2250 :     2. Some further cleanup of CM's parallel make mechanism.
2251 :    
2252 :     ----------------------------------------------------------------------
2253 :     Name: Matthias Blume
2254 : blume 801 Date: 2001/03/19 17:53:00 EST
2255 :     Tag: blume-20010319-parallel
2256 :     Description:
2257 :    
2258 :     Parallel make (using compile servers) now works again.
2259 :    
2260 :     To this end, CM.stabilize and CMB.make have been modified to work in
2261 :     two passes when compile servers are attached:
2262 :     1. Compile everything, do not perform stabilization; this pass
2263 :     uses compile servers
2264 :     2. Stabilize everything; this pass does not use compile servers
2265 :     If there are no compile servers, the two passes are combined into one
2266 :     (as before). Splitting the passes increases the inherent parallelism
2267 :     in the dependency graph because the entire graph including all
2268 :     libraries is available at the same time. This, in turn, improves
2269 :     server utilization. The downside is that the master process will
2270 :     have to do some extra work after compilation is done (because for
2271 :     technical reasons it must re-read all the binfiles during stabilization).
2272 :    
2273 :     ----------------------------------------------------------------------
2274 :     Name: Matthias Blume
2275 : blume 800 Date: 2001/03/16 12:22:00 EST
2276 :     Tag: blume-20010316-bootfiles
2277 :     Description:
2278 :    
2279 :     Created a new set of bootfiles (for your automatic installation convenience).
2280 :    
2281 :     ----------------------------------------------------------------------
2282 :     Name: Matthias Blume
2283 : blume 799 Date: 2001/03/16 11:00:00 EST
2284 :     Tag: blume-20010316-MLTREE-fixup
2285 :     Description:
2286 :    
2287 :     This is a minor fixup for an (untagged) earlier commit by Allen.
2288 :     (A file was missing).
2289 :    
2290 :     ----------------------------------------------------------------------
2291 : leunga 788 Name: Allen Leung
2292 : leunga 796 Date: Mon Mar 5 18:54:57 EST 2001
2293 :     Tag: leunga-20010305-cut-support
2294 :    
2295 :     1. New support for alternative control-flow in MLTREE.
2296 :     Currently we support
2297 :    
2298 :     FLOW_TO(CALL ...., [k1,...,kn])
2299 :    
2300 :     This is needed for 'cuts to' in C-- and try/handle-like constructs
2301 :     in Moby
2302 :    
2303 :     New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
2304 :    
2305 :     2. Register Allocator
2306 :    
2307 :     Changes in interface [from Fermin, John]
2308 :    
2309 :     3. Alpha 8-bit SLL support [Fermin]
2310 :    
2311 :     4. All architectures
2312 :    
2313 :     A new module (ClusterExpandCopies) for expanding parallel copies.
2314 :    
2315 :     ----------------------------------------------------------------------
2316 :     Name: Allen Leung
2317 : leunga 788 Date: 2001/02/27 23:07:00 EST
2318 :     Tag: leunga-20010227-minor-stuff
2319 :    
2320 :     1. Alpha bug fix for CMOVNE
2321 :     2. Handle mltree COND(..,FCMP ...,...)
2322 :     3. Bug fix in simplifier
2323 :    
2324 :     ----------------------------------------------------------------------
2325 : blume 777 Name: Matthias Blume
2326 : blume 781 Date: 2001/01/30 17:50:00 EST
2327 :     Tag: blume-20010130-sync
2328 :     Description:
2329 :    
2330 :     This is just a minor update to sync my devel branch with the main brach.
2331 :     The only visible change is the addition of some README files.
2332 :    
2333 :     ----------------------------------------------------------------------
2334 :     Name: Matthias Blume
2335 : blume 778 Date: 2001/01/12 23:30:00 JST
2336 :     Tag: blume-20010112-bootfiles
2337 :     Description:
2338 :    
2339 :     Made a new set of bootfiles that goes with the current state of the
2340 :     repository.
2341 :    
2342 :     ----------------------------------------------------------------------
2343 :     Name: Matthias Blume
2344 : blume 777 Date: 2001/01/12 21:20:00 JST
2345 :     Tag: blume-20010112-sync
2346 :     Description:
2347 :    
2348 :     I am just flushing out some minor changes that had accumulated in
2349 :     my private branch in order to sync with the main tree. (This is
2350 :     mainly because I had CVS trouble when trying to merge _into_ my
2351 :     private branch.)
2352 :    
2353 :     Most people should be completely unaffected by this.
2354 :    
2355 :     ----------------------------------------------------------------------
2356 : leunga 775 Name: Allen Leung
2357 :     Date: Thu Jan 11 21:03:00 EST 2001
2358 :     Tag: leunga-20010111-labexp=mltree
2359 :     Description:
2360 :    
2361 :     1. Removed the type LabelExp and replace it by MLTree.
2362 :     2. Rewritten mltree-simplify with the pattern matcher tool.
2363 :     3. There were some bugs in alpha code generator which would break
2364 :     64-bit code generation.
2365 :     4. Redo the tools to generate code with the
2366 :     5. The CM files in MLRISC (and in src/system/smlnj/MLRISC)
2367 :     are now generated by perl scripts.
2368 :    
2369 :     ----------------------------------------------------------------------
2370 : blume 771 Name: Matthias Blume
2371 : blume 774 Date: 2001/01/10 21:55:00 JST
2372 :     Tag: blume-20010110-rcc
2373 :     Description:
2374 :    
2375 :     The RCC stuff now seems to work (but only on the x86).
2376 :     This required hacking of the c-calls interface (and -implementation) in
2377 :     MLRISC.
2378 :    
2379 :     Normal compiler users should be unaffected.
2380 :    
2381 :     ----------------------------------------------------------------------
2382 :     Name: Matthias Blume
2383 : blume 773 Date: 2001/01/09 01:20:00 JST
2384 :     Tag: blume-20010109-rcc
2385 :     Description:
2386 :    
2387 :     This is a fairly big patch, flushing out a large number of pending
2388 :     changes that I made to my development copy over the last couple of days.
2389 :    
2390 :     Of practical relevance at this moment is a workaround for a pickling
2391 :     bug that Allen ran into the other day. The cause of the bug itself is
2392 :     still unknown and it might be hard to fix it properly, but the
2393 :     workaround has some merits of its own (namely somewhat reducing pickling
2394 :     overhead for certain libraries). Therefore, I think this solution should
2395 :     be satisfactory at this time.
2396 :    
2397 :     The rest of the changes (i.e., the vast majority) has to do with my
2398 :     ongoing efforts of providing direct support for C function calls from
2399 :     ML. At the moment there is a new primop "RAW_CCALL", typing magic
2400 :     in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
2401 :     case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
2402 :     translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
2403 :     handle RCC.
2404 :    
2405 :     The last part (the changes to mlriscGen.sml) are still known to be
2406 :     wrong on the x86 and not implemented on all other architectures. But
2407 :     the infrastructure is in place. I had to change a few functor
2408 :     signatures in the backend to be able to route the CCalls interface
2409 :     from MLRISC there, and I had to specialize the mltree type (on the
2410 :     x86) to include the necessary extensions. (The extensions themselves
2411 :     were already there and redy to go in MLRISC/x86).
2412 :    
2413 :     Everything should be very happy as soon as someone helps me with
2414 :     mlriscGen.sml...
2415 :    
2416 :     In any case, nothing of this should matter to anyone as long as the
2417 :     new primop is not being used (which is going to be the case unless you
2418 :     find it where I hid it :). The rest of the compiler is completely
2419 :     unaffected.
2420 :    
2421 :     ----------------------------------------------------------------------
2422 :     Name: Matthias Blume
2423 : blume 772 Date: 2001/01/05 00:30:00 JST
2424 :     Tag: blume-20010105-primops
2425 :     Description:
2426 :    
2427 :     Added some experimental support for work that I am doing right now.
2428 :     These changes mostly concern added primops, but there is also a new
2429 :     experimental C library in the runtime system (but currently not enabled
2430 :     anywhere except on Linux/X86).
2431 :    
2432 :     In the course of adding primops (and playing with them), I discovered that
2433 :     Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
2434 :     broken. (Zhong was very right he labeled this stuff as "major gross hack".)
2435 :     To recover, I made type information in INL_PRIM mandatory and changed
2436 :     prim.sml as well as built-in.sml accordingly. The InLine structure now
2437 :     has complete, correct type information (i.e., no bottom types).
2438 :    
2439 :     Since all these changes mean that we need new binfiles, I also bumped the
2440 :     version number to 110.32.1.
2441 :    
2442 :     ----------------------------------------------------------------------
2443 :     Name: Matthias Blume
2444 : blume 771 Date: 2000/12/30 22:10:00 JST
2445 :     Tag: blume-20001230-various
2446 :     Description:
2447 :    
2448 :     Added proxy libraries for MLRISC and let MLRISC libraries refer
2449 :     to each other using path anchors. (See CM manual for explanation.)
2450 :    
2451 :     Updated CM documentation.
2452 :    
2453 :     Fixed some bugs in CM.
2454 :    
2455 :     Implemented "proxy" libraries (= syntactic sugar for CM).
2456 :    
2457 :     Added "-quiet" option to makeml and changed runtime system accordingly.
2458 :    
2459 :     Added cleanup handler for exportML to reset timers and compiler stats.
2460 :    
2461 :     ----------------------------------------------------------------------
2462 : george 761 Name: Lal George
2463 :     Date: 2000/12/22 22:22:58 EST 2000
2464 :     Tag: Release_110_32
2465 :     Description:
2466 :    
2467 :     Infinite precision used throughout MLRISC.
2468 :     see MLRISC/mltree/machine-int.sig
2469 :    
2470 :     ----------------------------------------------------------------------
2471 : blume 756 Name: Matthias Blume
2472 : blume 760 Date: 2000/12/22 23:16:00 JST
2473 :     Tag: blume-20001222-warn
2474 :     Description:
2475 : blume 759
2476 : blume 760 Corrected wording and formatting of some CM warning message which I
2477 :     broke in my previous patch.
2478 : blume 759
2479 :     ----------------------------------------------------------------------
2480 :     Name: Matthias Blume
2481 : blume 763 Date: 2000/12/22 21:20:00 JST
2482 :     Tag: blume-20001222-anchorenv
2483 :     Description:
2484 :    
2485 :     Fixed CM's handling of anchor environments in connection with CMB.make.
2486 :    
2487 :     ----------------------------------------------------------------------
2488 :     Name: Matthias Blume
2489 : blume 758 Date: 2000/12/22 13:15:00 JST
2490 :     Tag: blume-20001222-cleanup
2491 :     Description:
2492 :    
2493 :     Removed src/cm/ffi which does not (and did not) belong here.
2494 :    
2495 :     ----------------------------------------------------------------------
2496 :     Name: Matthias Blume
2497 : blume 757 Date: 2000/12/21 23:55:00 JST
2498 :     Tag: blume-20001221-exn
2499 :     Description:
2500 :    
2501 :     Probably most important: CM no longer silently swallows all exceptions
2502 :     in the compiler.
2503 :     Plus: some other minor CM changes. For example, CM now reports some
2504 :     sizes for generated binfiles (code, data, envpickle, lambdapickle).
2505 :    
2506 :     ----------------------------------------------------------------------
2507 :     Name: Matthias Blume
2508 : blume 756 Date: 2000/12/15 00:01:05 JST
2509 :     Tag: blume-20001215-dirtool
2510 :     Description:
2511 :    
2512 :     - "dir" tool added.
2513 :     - improvements and cleanup to Tools structure
2514 :     - documentation updates
2515 :    
2516 :     ----------------------------------------------------------------------
2517 : leunga 752 Name: Allen Leung
2518 : leunga 755 Date: Thu Dec 14 03:45:24 EST 2000
2519 :     Description:
2520 :     Tag: leunga-20001214-int-inf
2521 :     Description:
2522 :    
2523 :     In IntInf, added these standard functions, which are missing from our
2524 :     implementation:
2525 :    
2526 :     andb : int * int -> int
2527 :     xorb : int * int -> int
2528 :     orb : int * int -> int
2529 :     notb : int -> int
2530 :     << : int * word -> int
2531 :     ~>> : int * word -> int
2532 :    
2533 :     Not tested, I hope they are correct.
2534 :    
2535 :     ----------------------------------------------------------------------
2536 :     Name: Allen Leung
2537 : leunga 752 Date: Fri Dec 8 19:23:26 EST 2000
2538 :     Description:
2539 :     Tag: leunga-20001208-nowhere
2540 :     Description:
2541 :    
2542 :     Slight improvements to the 'nowhere' tool to handle OR-patterns,
2543 :     to generate better error messages etc. Plus a brief manual.
2544 :    
2545 :     ----------------------------------------------------------------------
2546 : george 749 Name: Lal George
2547 :     Date: 2000/12/08 09:54:02 EST 2000
2548 :     Tag: Release_110_31
2549 :     Description:
2550 : george 705
2551 : george 749 - Version 110.31
2552 : leunga 591 ----------------------------------------------------------------------
2553 : leunga 744 Name: Allen Leung
2554 :     Date: Thu Dec 7 22:01:04 EST 2000
2555 :     Tag: leunga-20001207-cell-monster-hack
2556 :     Description:
2557 :    
2558 :     Major MLRISC internal changes. Affect all clients.
2559 :     Summary:
2560 :    
2561 :     1. Type CELLS.cell = int is now replaced by a datatype.
2562 :     As a result, the old regmap is now gone. Almost all interfaces
2563 :     in MLRISC change as a consequence.
2564 :    
2565 :     2. A new brand version of machine description tool (v3.0) that generates
2566 :     modules expecting the new interface. The old version is removed.
2567 :    
2568 :     3. The RA interface has been further abstracted into two new functors.
2569 :     RISC_RA and X86RA. These functors have much simpler interfaces.
2570 :     [See also directory MLRISC/demo.]
2571 :    
2572 :     4. Some other new source->source code generation tools are available:
2573 :    
2574 :     a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
2575 :     b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
2576 :     I use this tool to generate the peephole optimizers---with the new
2577 :     cell type changes, peephole rules are becoming difficult to write
2578 :     without conditional pattern matching.
2579 :    
2580 :     5. More Intmap -> IntHashTable change. Previous changes by Matthias didn't
2581 :     cover the entire MLRISC source tree so many things broke.
2582 :    
2583 :     6. CM files have been moved to the subdirectory MLRISC/cm.
2584 :     They are moved because there are a lot of them and they clutter up the
2585 :     root dir.
2586 :    
2587 :     7. More detailed documentation to come...
2588 :    
2589 :     NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
2590 :     a makeml -rebuild first. This is because of other other
2591 :     changes that Matthias has made (see below).
2592 :    
2593 :    
2594 :     ----------------------------------------------------------------------
2595 : blume 733 Name: Matthias Blume
2596 : blume 742 Date: 2000/11/30 23:12:00 JST
2597 :     Tag: blume-20001130-filereorg
2598 :     Description:
2599 :    
2600 :     Some manual updates and some file reorganizations in CM.
2601 :    
2602 :     ----------------------------------------------------------------------
2603 :     Name: Matthias Blume
2604 : blume 737 Date: 2000/11/24 17:45:00 JST
2605 :     Tag: blume-20001124-link
2606 :     Description:
2607 :    
2608 :     Drastically improved link traversal code for the case that the dynamic
2609 :     value was already loaded at bootstrap time. As a result, CM and CMB
2610 :     now both load blazingly fast -- even on a very slow machine. Also,
2611 :     memory consumption has been further reduced by this.
2612 :    
2613 :     Warning: The format of the PIDMAP file has changed. THerefore, to
2614 :     bootstrap you have to do this:
2615 :    
2616 :     1. Run CMB.make
2617 :     2. Make a symbolic link for the boot directory:
2618 :     ln -s sml.boot.ARCH-OS xxx
2619 :     3. "Rebuild" the boot directory:
2620 :     ./makeml -boot xxx -rebuild sml ; rm xxx
2621 :     4. Boot normally:
2622 :     ./makeml
2623 :    
2624 :     ----------------------------------------------------------------------
2625 :     Name: Matthias Blume
2626 : blume 735 Date: 2000/11/21 21:20:00 JST
2627 :     Tag: blume-20001121-tools
2628 :     Description:
2629 :    
2630 :     Continued hacking on autoloading problem -- with success this time.
2631 :     Also changed tool-plugin mechanism. See new CM manual.
2632 :    
2633 :     ----------------------------------------------------------------------
2634 :     Name: Matthias Blume
2635 : blume 734 Date: 2000/11/19 14:30:00 JST
2636 :     Tag: blume-20001119-autoload
2637 :     Description:
2638 :    
2639 :     Some hacking to make autoloading faster. Success for CMB, no success
2640 :     so far for CM. There is a reduced structure CM' that autoloads faster.
2641 :     (This is a temporary, non-documented hack to be eliminated again when
2642 :     the general problem is solved.)
2643 :    
2644 :     ----------------------------------------------------------------------
2645 :     Name: Matthias Blume
2646 : blume 733 Date: 2000/11/17 14:10:00 JST
2647 :     Tag: blume-20001117-pickle-lib
2648 :     Description:
2649 :    
2650 :     1. Eliminated comp-lib.cm
2651 :     2. Made pickle-lib.cm
2652 :     3. Eliminated all uses of intset.sml (from comp-lib.cm)
2653 :     4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
2654 :     equivalent constructs from smlnj-lib.cm (INtHashTable).
2655 :     5. Point 4. also goes for those uses of intmap.* in MLRISC.
2656 :     Duplicated intmap modules thrown out.
2657 :     6. Hunted down all duplicated SCC code and replaced it with
2658 :     equivalent stuff (GraphSCCFn from smlnj-lib.cm).
2659 :     7. Rewrote Feedback module.
2660 :     8. Moved sortedlist.sml into viscomp-lib.cm. Eventually it
2661 :     should be thrown out and equivalent modules from smlnj-lib.cm
2662 :     should be used (IntRedBlackSet, IntListSet, ...).
2663 :    
2664 :     Confirmed that compiler compiles to fixpoint.
2665 :    
2666 :     ----------------------------------------------------------------------
2667 : leunga 731 Name: Allen Leung
2668 :     Date: 2000/11/10 18:00:00
2669 :     Tag: leunga-20001110-new-x86-fp
2670 :    
2671 :     A new x86 floating point code generator has been added.
2672 :     By default this is turned off. To turn this on, do:
2673 :    
2674 :     CM.autoload "$smlnj/compiler.cm";
2675 :     Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
2676 :    
2677 :     Changes:
2678 :    
2679 :     1. Changed FTAN to FPTAN so that the assembly output is correct.
2680 :     2. Changed the extension callback for FTANGENT to generate:
2681 :    
2682 :     fptan
2683 :     fstp %st(0)
2684 :     instead of
2685 :     fptan
2686 :     fstpl ftempmem
2687 :    
2688 :     3. Numerous assembly fixes for x86.
2689 :    
2690 :     5. Cleaned up the machine code output module x86/x86MC.sml and added
2691 :     support for a whole bunch of instructions and addressing modes:
2692 :    
2693 :     fadd/fsub/fsubr/fmul/fdiv/fdivr %st, %st(n)
2694 :     faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp %st, %st(n)
2695 :     fadd/fsub/fsubr/fmul/fdiv/fdivr %st(n), %st
2696 :     fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
2697 :     fxch %st(n)
2698 :     fld %st(n)
2699 :     fst %st(n)
2700 :     fst mem
2701 :     fstp %st(n)
2702 :     fucom %st(n)
2703 :     fucomp %st(n)
2704 :    
2705 :     All these are now generated when the fast fp mode is turned on.
2706 :    
2707 :     6. Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
2708 :    
2709 :     ----------------------------------------------------------------------
2710 : blume 729 Name: Matthias Blume
2711 :     Date: 2000/11/09 11:20:00 JST
2712 :     Tag: blume-20001109-scc
2713 :     Description:
2714 :    
2715 :     Eliminated some code duplication:
2716 :    
2717 :     1. Added "where" clause to GraphSCCFn in SML/NJ Library.
2718 :     (Otherwise the functor is useless.)
2719 :     2. Used GraphSCCFn where SCCUtilFun was used previously.
2720 :     3. Got rid of SCCUtilFun (in comp-lib.cm).
2721 :    
2722 :     ----------------------------------------------------------------------
2723 : george 721 Name: Lal George
2724 :     Date: 2000/11/06 09:02:21 EST 2000
2725 :     Tag: Release_110_30
2726 :     Description:
2727 :    
2728 :     - Version 110.30
2729 :     ----------------------------------------------------------------------
2730 : blume 715 Name: Matthias Blume
2731 : blume 716 Date: 2000/11/04 14:45:00
2732 :     Tag: blume-20001104-mlbuild
2733 :     Description:
2734 :    
2735 :     - Made ml-build faster on startup.
2736 :     - Documentation fixes.
2737 :    
2738 :     ----------------------------------------------------------------------
2739 :     Name: Matthias Blume
2740 : blume 715 Date: 2000/11/02 17:00:00 JST
2741 :     Tag: blume-20001102-condcomp
2742 :     Description:
2743 :    
2744 :     - Small tweaks to pickler -- new BOOTFILES!
2745 :     - Version bumped to 110.29.2.
2746 :     - Added conditional compilation facility to init.cmi (see comment there).
2747 :     ----------------------------------------------------------------------
2748 : leunga 713 Name: Allen Leung
2749 :     Date: 2000/10/23 19:31:00
2750 :     Tag: leunga-20001023-demo-ra
2751 :    
2752 :     1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
2753 :     2. Test programs for the graph library updated
2754 :     3. Some new MLRISC demo programs added
2755 :    
2756 :     ----------------------------------------------------------------------
2757 : blume 710 Name: Matthias Blume
2758 : blume 711 Date: 2000/08/31 22:15:00 JST
2759 :     Tag: blume-20001017-errmsg
2760 :     Description:
2761 :    
2762 :     More error message grief: Where there used to be no messages, there
2763 :     now were some that had bogus error regions. Fixed.
2764 :    
2765 :     ----------------------------------------------------------------------
2766 :     Name: Matthias Blume
2767 : blume 710 Date: 2000/08/31 17:30:00 JST
2768 :     Tag: blume-20001017-v110p29p1
2769 :     Description:
2770 :    
2771 :     I made a version 110.29.1 with new bootfiles.
2772 :    
2773 :     Changes: Modified pickler/unpickler for faster and leaner unpickling.
2774 :     CM documentation changes and a small bugfix in CM's error reporting.
2775 :    
2776 :     ----------------------------------------------------------------------
2777 : george 705 Name: Lal George
2778 :     Date: 2000/09/27 14:42:35 EDT
2779 :     Tag: george-20000927-nodestatus
2780 :     Description:
2781 :    
2782 :     Changed the type of the nodestatus, so that:
2783 :    
2784 :     SPILLED(~1) is now SPILLED
2785 :     SPILLED(m) where m>=0 is now MEMREG(m)
2786 :     SPILLED(s) where s<~1 is now SPILL_LOC(~s)
2787 :    
2788 :     ----------------------------------------------------------------------
2789 : blume 697 Name: Matthias Blume
2790 : blume 703 Date: 2000/09/07 14:45:00 JST
2791 :     Tag: blume-20000907-cmerrmsg
2792 :     Description:
2793 :    
2794 :     Small tweak to CM to avoid getting ML syntax error messages twice.
2795 :    
2796 :     ----------------------------------------------------------------------
2797 :     Name: Matthias Blume
2798 : blume 701 Date: 2000/08/31 18:00:00 JST
2799 :     Tag: blume-20000831-cvsbootfiles
2800 :     Description:
2801 :    
2802 :     New URL for boot files (because the 110.29 files on the BL server do
2803 :     now work correctly with my updated install scripts for yacc and lex).
2804 :    
2805 :     ----------------------------------------------------------------------
2806 :     Name: Matthias Blume
2807 : blume 697 Date: 2000/08/08 12:33:00 JST
2808 :     Tag: blume-20000808-manual
2809 :     Description:
2810 :    
2811 :     Tiny update to CM manual.
2812 :    
2813 :     ----------------------------------------------------------------------
2814 : leunga 695 Name: Allen Leung
2815 :     Date: 2000/08/7 19:31:00
2816 :     Tag: leunga-20000807-a-whole-bunch-of-stuff
2817 :    
2818 :     Moby, C--, SSA, x86, machine descriptions etc. Should only affect C--
2819 :     and Mobdy.
2820 :    
2821 :     1. x86
2822 :    
2823 :     a. Fixes to peephole module by John and Dan.
2824 :     b. Assembly fix to SETcc by Allen.
2825 :     c. Fix to c-call by John.
2826 :     d. Fix to spilling by John. (This one deals with the missing FSTPT case)
2827 :     e. Instruction selection optimization to SETcc as suggested by John.
2828 :    
2829 :     For example,
2830 :    
2831 :     MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
2832 :    
2833 :     should generate:
2834 :    
2835 :     MOVL a, x
2836 :     SUBL b, x
2837 :     SHRL 31, x
2838 :    
2839 :     2. IR stuff
2840 :    
2841 :     A bunch of new DJ-graph related algorithms added. These
2842 :     speed up SSA construction.
2843 :    
2844 :     3. SSA + Scheduling
2845 :    
2846 :     Added code for SSA and scheduling to the repository
2847 :    
2848 :     ----------------------------------------------------------------------
2849 : george 694 Name: Lal George
2850 :     Date: 2000/07/27 11:53:14 EDT
2851 :    
2852 :     Tag: lal-20000727-linux-ppc
2853 :     Description:
2854 :    
2855 :     Made changes to support Linux PPC.
2856 :     p.s. I have confirmation that the 110.29 boot files work fine.
2857 :    
2858 :     ----------------------------------------------------------------------
2859 : blume 684 Name: Matthias Blume
2860 : blume 692 Date: 2000/07/27 17:40:00 JST
2861 :     Tag: blume-20000727-scripts
2862 :     Description:
2863 :    
2864 :     !!!! WARNING !!!!
2865 :     You must recompile the runtime system!
2866 :     !!!! WARNING !!!!
2867 :    
2868 :     This is basically another round of script-enhancements:
2869 :    
2870 :     1. sml, ml-build, and ml-makedepend accept options -D and -U to define
2871 :     and undefine CM preprocessor symbols.
2872 :    
2873 :     2. ml-build avoids generating a new heap image if it finds that the
2874 :     existing one is still ok. (The condition is that no ML file had to
2875 :     be recompiled and all ML files are found to be older that the heap
2876 :     file.)
2877 :    
2878 :     To make this work smoothly, I also hacked the runtime system as
2879 :     well as SMLofNJ.SysInfo to get access to the heap image suffix
2880 :     (.sparc-solaris, ...) that is currently being used.
2881 :    
2882 :     Moreover, the signature of CM.mk_standalone has changed. See the
2883 :     CM manual.
2884 :    
2885 :     3. ml-makedepend accepts additional options -n, -a, and -o. (See the
2886 :     CM manual for details.)
2887 :    
2888 :     4. More CM manual updates:
2889 :     - all of the above has been documented.
2890 :     - there is now a section describing the (CM-related) command line
2891 :     arguments that are accepted by the "sml" command
2892 :    
2893 :     ----------------------------------------------------------------------
2894 :     Name: Matthias Blume
2895 : blume 691 Date: 2000/07/25 16:20:00 JST
2896 :     Tag: blume-20000725-makedepend
2897 :     Description:
2898 :    
2899 :     Added a script called ml-makedepend. This can be used in makefiles
2900 :     for Unix' make in a way very similar to the "makedepend" command for
2901 :     C.
2902 :    
2903 :     The script internally uses function CM.sources.
2904 :    
2905 :     Synopsis:
2906 :    
2907 :     ml-makedepend [-f makefile] cmfile targetname
2908 :    
2909 :     The default for the makefile is "makefile" (or "Makefile" should
2910 :     "makefile" not exist).
2911 :    
2912 :     ml-makedepend adds a cmfile/targetname-specific section to this
2913 :     makefile (after removing the previous version of this section). The
2914 :     section contains a single dependency specification with targetname on
2915 :     the LHS (targetname is an arbitrary name), and a list of files derived
2916 :     from the cmfile on the RHS. Some of the files on the RHS are
2917 :     ARCH/OPSYS-specific. Therefore, ml-makedepend inserts references to
2918 :     "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
2919 :     path names. The makefile writer is responsible for making sure that
2920 :     these variables have correct at the time "make" is invoked.
2921 :    
2922 :     ----------------------------------------------------------------------
2923 :     Name: Matthias Blume
2924 : blume 690 Date: 2000/07/22 23:30:00 JST
2925 :     Tag: blume-20000722-urlupdate
2926 :     Description:
2927 :    
2928 :     Changed BOOT and config/srcarchiveurl to point to BL server:
2929 :    
2930 :     ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
2931 :    
2932 :     ----------------------------------------------------------------------
2933 :     Name: Matthias Blume
2934 : blume 686 Date: 2000/07/18 18:00:00 JST
2935 :     Tag: blume-20000718-Version_110_29
2936 :     Description:
2937 :    
2938 :     1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
2939 :    
2940 :     2. Updated config/version to 110.29
2941 :    
2942 :     3. Updated config/srcarchiveurl
2943 :    
2944 :     3. New boot files!
2945 :     ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
2946 :    
2947 :     ----------------------------------------------------------------------
2948 :     Name: Matthias Blume
2949 : blume 684 Date: 2000/07/11 13:58:00 JST
2950 :     Tag: blume-20000711-doctypo
2951 :     Description:
2952 :    
2953 :     Fixed a few typos in CM manual.
2954 :    
2955 :     ----------------------------------------------------------------------
2956 : leunga 683 Name: Allen Leung
2957 :     Date: 2000/06/15 00:38:00
2958 :     Tag: leunga-20000704-sparc-x86
2959 :    
2960 :     1. x86 peephole improvement sp += k; sp -= k => nop [from John]
2961 :     2. fix to x86 RET bug [found by Dan Grossman]
2962 :     3. sparc assembly bug fix for ticc instructions [found by Fermin]
2963 :    
2964 :     Affects c-- and moby only
2965 :    
2966 :     ----------------------------------------------------------------------
2967 : blume 680 Name: Matthias Blume
2968 : blume 682 Date: 2000/07/04 15:26:00
2969 :     Tag: blume-20000704-trigger
2970 :     Description:
2971 :    
2972 :     1. Improvements to CM manual.
2973 :     2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
2974 :     of getting a back-trace. The function, when called, raises an
2975 :     internal exception which explicitly carries the full back-trace history,
2976 :     so it is unaffected by any intervening handle-raise pairs ("trivial"
2977 :     or not). The interactive loop will print that history once it arrives
2978 :     at top level.
2979 :     Short of having all exceptions implicitly carry the full history, the
2980 :     recommended way of using this facility is:
2981 :     - compile your program with instrumentation "on"
2982 :     - run it, when it raises an exception, look at the history
2983 :     - if the history is "cut off" because of some handler, go and modify
2984 :     your program so that it explicitly calls BTrace.trigger
2985 :     - recompile (still instrumented), and rerun; look at the full history
2986 :    
2987 :     ----------------------------------------------------------------------
2988 :     Name: Matthias Blume
2989 :     Date: 2000/07/03 15:36:00 JST
2990 : blume 680 Tag: blume-20000702-manual
2991 :     Description:
2992 :    
2993 :     Small corrections and updates to CM manual.
2994 :    
2995 :     ----------------------------------------------------------------------
2996 : blume 682 Name: Matthias Blume
2997 : blume 679 Date: 2000/06/29 16:04:00 JST
2998 :     Tag: blume-20000629-yacctool
2999 :     Description:
3000 :    
3001 :     Changes:
3002 :    
3003 :     1. Class "mlyacc" now takes separate arguments to pass options to
3004 :     generated .sml- and .sig-files independently.
3005 :     2. Corresponding CM manual updates.
3006 :     3. BTrace module now also reports call sites. (However, for loop clusters
3007 :     it only shows from where the cluster was entered.) There are associated
3008 :     modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
3009 :    
3010 :     ----------------------------------------------------------------------
3011 : blume 675 Name: Matthias Blume
3012 : blume 678 Date: 2000/06/27 16:51:00 JST
3013 :     Tag: blume-20000627-noweb
3014 :     Description:
3015 :    
3016 :     Changes:
3017 :    
3018 :     1. Implemented "subdir" and "witness" options for noweb tool.
3019 :     This caused some slight internal changes in CM's tool implementation.
3020 :     2. Fixed bug in "tool plugin" mechanism. This is essentially cleaning
3021 :     some remaining issues from earlier path anchor changes.
3022 :     3. Updated CM manual accordingly.
3023 :    
3024 :     4. Changed implementation of back-tracing so that I now consider it
3025 :     ready for prime-time.
3026 :    
3027 :     In particular, you don't have to explicitly trigger the back-trace
3028 :     anymore. Instead, if you are running BTrace-instrumented code and
3029 :     there is an uncaught exception (regardless of whether or not it was
3030 :     raised in instrumented code), the top-level evalloop will print
3031 :     the back-trace.
3032 :    
3033 :     Features:
3034 :    
3035 :     - Instrumented and uninstrumented code work together seemlessly.
3036 :     (Of course, uninstrumented code is never mentioned in actual
3037 :     back-traces.)
3038 :    
3039 :     - Asymptotic time- and space-complexity of instrumented code is
3040 :     equal to that of uninstrumented code. (This means that
3041 :     tail-recursion is preserved by the instrumentation phase.)
3042 :    
3043 :     - Modules whose code has been instrumented in different sessions
3044 :     work together without problem.
3045 :    
3046 :     - There is no penalty whatsoever on uninstrumented code.
3047 :    
3048 :     - There is no penalty on "raise" expressions, even in
3049 :     instrumented code.
3050 :    
3051 :     A potential bug (or perhaps it is a feature, too):
3052 :    
3053 :     A back-trace reaches no further than the outermost instrumented
3054 :     non-trivial "raise". Here, a "trivial" raise is one that is the
3055 :     sole RHS of a "handle" rule. Thus, back-traces reach trough
3056 :    
3057 :     <exp> handle e => raise e
3058 :    
3059 :     and even
3060 :    
3061 :     <exp> handle Foo => raise Bar
3062 :    
3063 :     and, of course, through
3064 :    
3065 :     <exp> handle Foo => ...
3066 :    
3067 :     if the exception was not Foo.
3068 :    
3069 :     Back-traces always reach right through any un-instrumented code
3070 :     including any of its "handle" expressions, trivial or not.
3071 :    
3072 :     To try this out, do the following:
3073 :    
3074 :     - Erase all existing binfiles for your program.
3075 :     (You may keep binfiles for those modules where you think you
3076 :     definitely don't need back-tracing.)
3077 :     - Turn on back-trace instrumentation:
3078 :     SMLofNJ.Internals.BTrace.mode (SOME true);
3079 :     - Recompile your program. (I.e., run "CM.make" or "use".)
3080 :     - You may now turn instrumentation off again (if you want):
3081 :     SMLofNJ.Internals.BTrace.mode (SOME false);
3082 :     - Run your program as usual. If it raises an exception that
3083 :     reaches the interactive toplevel, then a back-trace will
3084 :     automatically be printed. After that, the toplevel loop
3085 :     will print the exception history as usual.
3086 :    
3087 :     ----------------------------------------------------------------------
3088 :     Name: Matthias Blume
3089 : blume 677 Date: 2000/06/26 09:56:46 JST
3090 :     Tag: blume-20000626-setup
3091 :     Description:
3092 :    
3093 :     CM: - setup-parameter to "sml" added; this can be used to run arbitrary
3094 :     ML code before and after compiling a file (e.g., to set compiler
3095 :     flags)
3096 :    
3097 :     Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
3098 :     - associated changes to btrace.sml (BTrace instrumentation pass)
3099 :     - cleaner implementation of btimp.sml (BTrace tracing and report
3100 :     module)
3101 :    
3102 :     CM manual: * new path encoding documented
3103 :     * description of setup-parameter to "sml" added
3104 :    
3105 :     The biggest user-visible change to back-tracing is that it is no
3106 :     longer necessary to compile all traced modules within the same
3107 :     session. (This was a real limitation.)
3108 :    
3109 :     ----------------------------------------------------------------------
3110 :     Name: Matthias Blume
3111 : blume 676 Date: 2000/06/24 12:40:00 JST
3112 :     Tag: blume-20000624-startup
3113 :     Description:
3114 :    
3115 :     Fixes startup slowdown problem. (I was calling SrcPath.sync a _tad_
3116 :     bit too often -- to put it mildly. :)
3117 :    
3118 :     ----------------------------------------------------------------------
3119 :     Name: Matthias Blume
3120 : blume 675 Date: 2000/06/23 18:20:00 JST
3121 :     Tag: blume-20000623-btrace
3122 :     Description:
3123 :    
3124 :     This updates adds a backtrace facility to aid programmers in debugging
3125 :     their programs. This involves the following changes:
3126 :    
3127 :     1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
3128 :     keeping track of the current call stack. When programs are compiled
3129 :     in a special mode, the compiler will insert calls to these hooks
3130 :     into the user program.
3131 :     "Hook" means that it is possible for different implementations of
3132 :     back-tracing to register themselves (at different times).
3133 :    
3134 :     2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
3135 :     as an Absyn.dec->Absyn.dec rewrite. Normally this phase is turned off.
3136 :     It can be turned on using this call:
3137 :     SMLofNJ.Internals.BTrace.mode (SOME true);
3138 :     Turning it off again:
3139 :     SMLofNJ.Internals.BTrace.mode (SOME false);
3140 :     Querying the current status:
3141 :     SMLofNJ.Internals.BTrace.mode NONE;
3142 :     Annotated programs are about twice as big as normal ones, and they
3143 :     run a factor of 2 to 4 slower with a dummy back-trace plugin (one
3144 :     where all hooks do nothing). The slowdown with a plugin that is
3145 :     actually useful (such as the one supplied by default) is even greater,
3146 :     but in the case of the default plugin it is still only an constant
3147 :     factor (amortized).
3148 :    
3149 :     3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
3150 :     with a sub-structure BTrace for controlling back-tracing. In particular,
3151 :     the above-mentioned function "mode" controls whether the annotation
3152 :     phase is invoked by the compiler. Another important function is
3153 :     "trigger": when called it aborts the current execution and causes
3154 :     the top-level loop to print a full back-trace.
3155 :    
3156 :     4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
3157 :     for back-tracing. It keeps track of the dynamic call stack and in
3158 :     addition to that it keeps a partial history at each "level" of that
3159 :     stack. For example, if a tail-calls b, b tail-calls c, and c tail-calls
3160 :     d and b (at separate times, dynamically), then the report will show:
3161 :    
3162 :     GOTO d
3163 :     /c
3164 :     GOTO \b
3165 :     CALL a
3166 :    
3167 :     This shows that there was an initial non-tail call of a, then a
3168 :     tail-call to b or c, looping behavior in a cluster of functions that
3169 :     consist of b and c, and then a goto from that cluster (i.e., either from
3170 :     b or from c) to d.
3171 :    
3172 :     Note that (depending on the user program) the amount of information
3173 :     that the back-trace module has to keep track of at each level is bounded
3174 :     by a constant. Thus, the whole implementation has the same asymptotical
3175 :     complexity as the original program (both in space and in time).
3176 :    
3177 :     5. compiler/TopLevel/interact/evalloop.sml has been modified to
3178 :     handle the special exception SMLofNJ.Internals.BTrace.BTrace
3179 :     which is raised by the "trigger" function mentioned above.
3180 :    
3181 :     Notes on usage:
3182 :    
3183 :     - Annotated code works well together with unannotated code:
3184 :     Unannotated calls simply do not show up at all in the backtrace.
3185 :    
3186 :     - It is not a good idea to let modules that were annotated during
3187 :     different sessions run at the same time. This is because the compiler
3188 :     chooses small integers to identify individual functions, and there
3189 :     will be clashes if different modules were compiled in separate sessions.
3190 :     (Nothing will crash, and you will even be told about the clashes, but
3191 :     back-trace information will in general not be useful.)
3192 :    
3193 :     - Back-tracing can be confused by callcc and capture.
3194 :    
3195 :     - The only way of getting a back-trace right now is to explicitly
3196 :     invoke the "trigger" function from your user program. Eventually, we
3197 :     should make every exception carry back-trace information (if
3198 :     available). But since this creates more overhead at "raise"-time
3199 :     (similar to the current exnHistory overhead), I have not yet
3200 :     implemented this. (The implementation will be rather easy.) With
3201 :     exceptions carrying back-trace information, this facility will be even
3202 :     more useful because users don't need to modify their programs...
3203 :    
3204 :     - While it is possible to compile the compiler with back-trace
3205 :     annotations turned on (I did it to get some confidence in
3206 :     correctness), you must make absolutely sure that core.sml and
3207 :     btimp.sml are compiled WITHOUT annotation! (core.sml cannot actually
3208 :     be compiled with annotation because there is no core access yet, but
3209 :     if you compile btimp.sml with annotation, then the system will go into
3210 :     an infinite recursion and crash.)
3211 :     Since CM currently does not know about BTrace, the only way to turn
3212 :     annotations on and off for different modules of the compiler is to
3213 :     interrupt CMB.make, change the settings, and re-invoke it. Of course,
3214 :     this is awkward and clumsy.
3215 :    
3216 :     Sample sessions:
3217 :    
3218 :     Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
3219 :     - SMLofNJ.Internals.BTrace.mode (SOME true);
3220 :     [autoloading]
3221 :     [autoloading done]
3222 :     val it = false : bool
3223 :     - structure X = struct
3224 :     - fun main n = let
3225 :     - fun a (x, 0) = d x
3226 :     - | a (x, n) = b (x, n - 1)
3227 :     - and b (x, n) = c (x, n)
3228 :     - and c (x, n) = a (x, n)
3229 :     - and d x = e (x, 3)
3230 :     - and e (x, 0) = f x
3231 :     - | e (x, n) = e (x, n - 1)
3232 :     - and f 0 = SMLofNJ.Internals.BTrace.trigger ()
3233 :     - | f n = n * g (n - 1)
3234 :     - and g n = a (n, 3)
3235 :     - in
3236 :     - f n
3237 :     - end
3238 :     - end;
3239 :     structure X : sig val main : int -> int end
3240 :     - X.main 3;
3241 :     *** BACK-TRACE ***
3242 :     GOTO stdIn:4.2-13.20: X.main[2].f
3243 :     GOTO-( stdIn:4.2-13.20: X.main[2].e
3244 :     GOTO stdIn:4.2-13.20: X.main[2].d
3245 :     / stdIn:4.2-13.20: X.main[2].a
3246 :     | stdIn:4.2-13.20: X.main[2].b
3247 :     GOTO-\ stdIn:4.2-13.20: X.main[2].c
3248 :     CALL stdIn:4.2-13.20: X.main[2].g
3249 :     GOTO stdIn:4.2-13.20: X.main[2].f
3250 :     GOTO-( stdIn:4.2-13.20: X.main[2].e
3251 :     GOTO stdIn:4.2-13.20: X.main[2].d
3252 :     / stdIn:4.2-13.20: X.main[2].a
3253 :     | stdIn:4.2-13.20: X.main[2].b
3254 :     GOTO-\ stdIn:4.2-13.20: X.main[2].c
3255 :     CALL stdIn:4.2-13.20: X.main[2].g
3256 :     GOTO stdIn:4.2-13.20: X.main[2].f
3257 :     GOTO-( stdIn:4.2-13.20: X.main[2].e
3258 :     GOTO stdIn:4.2-13.20: X.main[2].d
3259 :     / stdIn:4.2-13.20: X.main[2].a
3260 :     | stdIn:4.2-13.20: X.main[2].b
3261 :     GOTO-\ stdIn:4.2-13.20: X.main[2].c
3262 :     CALL stdIn:4.2-13.20: X.main[2].g
3263 :     GOTO stdIn:4.2-13.20: X.main[2].f
3264 :     CALL stdIn:2.15-17.4: X.main[2]
3265 :     -
3266 :    
3267 :     (Note that because of a FLINt bug the above code currently does not
3268 :     compile without BTrace turned on.)
3269 :    
3270 :     Here is another example, using my modified Tiger compiler:
3271 :    
3272 :     Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
3273 :     - SMLofNJ.Internals.BTrace.mode (SOME true);
3274 :     [autoloading]
3275 :     [autoloading done]
3276 :     val it = false : bool
3277 :     - CM.make "sources.cm";
3278 :     [autoloading]
3279 :     ...
3280 :     [autoloading done]
3281 :     [scanning sources.cm]
3282 :     [parsing (sources.cm):parse.sml]
3283 :     [creating directory CM/SKEL ...]
3284 :     [parsing (sources.cm):tiger.lex.sml]
3285 :     ...
3286 :     [wrote CM/sparc-unix/semant.sml]
3287 :     [compiling (sources.cm):main.sml]
3288 :     [wrote CM/sparc-unix/main.sml]
3289 :     [New bindings added.]
3290 :     val it = true : bool
3291 :     - Main.compile ("../testcases/merge.tig", "foo.out");
3292 :     *** BACK-TRACE ***
3293 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
3294 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
3295 :     CALL lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
3296 :     GOTO lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
3297 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
3298 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
3299 :     CALL lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
3300 :     / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
3301 :     CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
3302 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
3303 :     CALL lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
3304 :     CALL main.sml:1.18-118.4: Main.compile[2]
3305 :     -
3306 :    
3307 :     ----------------------------------------------------------------------
3308 : blume 673 Name: Matthias Blumen
3309 :     Date: 2000/06/21 18:00:00 JST
3310 :     Tag: blume-20000621-manual
3311 :     Description:
3312 :    
3313 :     CM manual update: Path environments documented.
3314 :    
3315 :     ----------------------------------------------------------------------
3316 : blume 666 Name: Matthias Blume
3317 : blume 672 Date: 2000/06/19 13:40:00
3318 :     Tag: blume-20000619-manual
3319 :     Description:
3320 :    
3321 :     CM manual and system/README update. This only covers the fact that
3322 :     there are no more implicit anchors. (Path environments and the "bind"
3323 :     option to "cm" have yet to be documented.)
3324 :    
3325 :     ----------------------------------------------------------------------
3326 :     Name: Matthias Blume
3327 : blume 671 Date: 2000/06/19 11:05:00 JST
3328 :     Tag: blume-20000619-chdir-bugfix
3329 :     Description:
3330 :    
3331 :     Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
3332 :    
3333 :     ----------------------------------------------------------------------
3334 :     Name: Matthias Blume
3335 : blume 670 Date: 2000/06/18 22:00:10 JST
3336 :     Tag: blume-20000618-implicit-anchors-really-gone
3337 :     Description:
3338 :    
3339 :     I updates the previous HISTORY entry where I forgot to mention that
3340 :     implicit anchors are no longer with us.
3341 :    
3342 :     The current update also gets rid of the (now useless) controller
3343 :     CM.Control.implicit_anchors.
3344 :    
3345 :     ----------------------------------------------------------------------
3346 :     Name: Matthias Blume
3347 : blume 666 Date: 2000/06/16 17:30:00 JST
3348 :     Tag: blume-20000616-anchorenv
3349 :     Description:
3350 :    
3351 :     This patch implements the long anticipated (just kidding :) "anchor
3352 :     environment" mechanism. In the course of doing this, I also
3353 :     re-implemented CM's internal "SrcPath" module from scratch. The new
3354 :     one should be more robust in certain boundary cases. In any case, it
3355 :     is a lot cleaner than its predecessor (IMHO).
3356 :    
3357 :     This time, although there is yet another boot file format change, I
3358 :     kept the unpickler backward-compatible. As a result, no new bootfiles
3359 :     are necessary and bootstrapping is straightforward. (You cannot read
3360 :     new bootfiles into an old system, but the other way around is no
3361 :     problem.)
3362 :    
3363 :     Visible changes:
3364 :    
3365 : blume 670 ** 0. Implicit path anchors (without the leading $-symbol) are no
3366 :     longer recognized at all. This means that such path names are not
3367 :     illegal either. For example, the name basis.cm simply refers to a
3368 :     local file called "basis.cm" (i.e, the name is an ordinary path
3369 :     relative to .cm-files directory). Or, to put it differently, only
3370 :     names that start with $ are anchored paths.
3371 : blume 666
3372 : blume 670 ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
3373 :     vanished.
3374 :    
3375 :     John (Reppy) had critizised this as soon as I originally proposed and
3376 : blume 666 implemented it, but at that time I did not really deeply believe
3377 :     him. :) Now I came full-circle because I need the $<singlearc> syntax
3378 :     in another place where it cannot be seen as an abbreviation for
3379 :     $/<singlearc>. To avoid the confusion, $<singlearc> now means what it
3380 :     seems to mean (i.e., it "expands" into the corresponding anchor
3381 :     value).
3382 :    
3383 :     However, when paths are used as members in CM description files, it
3384 :     continues to be true that there must be at least another arc after the
3385 :     anchor. This is now enforced separately during semantic analysis
3386 : blume 670 (i.e., from a lexical/syntactical point of view, the notation is ok.)
3387 : blume 666
3388 :     ** 2. The "cm" class now accepts an option "bind". The option's value
3389 :     is a sub-option list of precisely two items -- one labeled "anchor"
3390 :     and the other one labeled "value". As you might expect, "anchor" is
3391 :     used to specify an anchor name to be bound, and "value" specifies what
3392 :     the anchor is being bound to.
3393 :    
3394 :     The value must be a directory name and can be given in either standard
3395 :     syntax (including the possibility that it is itself an anchored path)
3396 :     or native syntax.
3397 :    
3398 :     Examples:
3399 :    
3400 :     foo.cm (bind:(anchor:bar value:$mystuff/bar))
3401 :     lib.cm (bind:(anchor:a value:"H:\\x\\y\\z")) (* only works under windows *)
3402 :    
3403 :     and so on.
3404 :    
3405 :     The meaning of this is that the .cm-file will be processed with an
3406 :     augmented anchor environment where the given anchor(s) is/are bound to
3407 :     the given values(s).
3408 :    
3409 :     The rationale for having this feature is this: Suppose you are trying
3410 :     to use two different (already stable) libraries a.cm and b.cm (that
3411 :     you perhaps didn't write yourself). Further, suppose each of these
3412 :     two libraries internally uses its own auxiliary library $aux/lib.cm.
3413 :     Normally you would now have a problem because the anchor "lib" can not
3414 :     be bound to more than one value globally. Therefore, the project that
3415 :     uses both a.cm and b.cm must locally redirect the anchor to some other
3416 :     place:
3417 :    
3418 :     a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
3419 :     b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
3420 :    
3421 :     This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
3422 :     /usr/lib/smlnj/b-stuff/aux.cm, respectively.
3423 :    
3424 :     Hard-wiring path names is a bit inflexible (and CM will verbosely warn
3425 :     you when you do so at the time of CM.stabilize). Therefore, you can
3426 :     also use an anchored path as the value:
3427 :    
3428 :     a.cm (bind:(anchor:lib value:$a-lib))
3429 :     b.cm (bind:(anchor:lib value:$b-lib))
3430 :    
3431 :     Now you can globally configure (using the usual CM.Anchor.anchor or
3432 :     pathconfig machinery) bindings for "a-lib" and "b-lib". Since "lib"
3433 :     itself is always locally bound, setting it globally is no longer
3434 :     meaningful or necessary (but it does not hurt either). In fact, "lib"
3435 :     can still be used as a global anchor for separate purposes. As a
3436 :     matter of fact, one can locally define "lib" in terms of a global
3437 :     "lib":
3438 :    
3439 :     a.cm (bind:(anchor:lib value:$lib/a))
3440 :     b.cm (bind:(anchor:lib value:$lib/b))
3441 :    
3442 :     ** 3: The encoding of path names has changed. This affects the way
3443 :     path names are shown in CM's progress report and also the internal
3444 :     protocol encoding used for parallel make.
3445 :    
3446 :     The encoding now uses one or more ':'-separated segments. Each
3447 :     segments corresponds to a file that has been specified relative to the
3448 :     file given by its preceding segment. The first segment is either
3449 :     relative to the CWD, absolute, or anchored. Each segment itself is
3450 :     basically a Unix pathname; all segments but the first are relative.
3451 :    
3452 :     Example:
3453 :    
3454 :     $foo/bar/baz.cm:a/b/c.sml
3455 :    
3456 :     This path denotes the file bar/a/b/c.sml relative to the directory
3457 :     denoted by anchor "foo". Notice that the encoding also includes
3458 :     baz.cm which is the .cm-file that listed a/b/c.sml. As usual, such
3459 :     paths are resolved relative to the .cm-files directory, so baz.cm must
3460 :     be ignored to get the "real" pathname.
3461 :    
3462 :     To make this fact more obvious, CM puts the names of such "virtual
3463 :     arcs" into parentheses when they appear in progress reports. (No
3464 :     parentheses will appear in the internal protocol encoding.) Thus,
3465 :     what you really see is:
3466 :    
3467 :     $foo/bar/(baz.cm):a/b/c.sml
3468 :    
3469 :     I find this notation to be much more informative than before.
3470 :    
3471 :     Another new feature of the encoding is that special characters
3472 :     including parentheses, colons, (back)slashes, and white space are
3473 :     written as \ddd (where ddd is the decimal encoding of the character).
3474 :    
3475 : blume 670 *** The CM manual still needs to be updated.
3476 :    
3477 : blume 666 ----------------------------------------------------------------------
3478 : leunga 660 Name: Allen Leung
3479 :     Date: 2000/06/15 00:38:00
3480 :     Tag: leunga-20000615-x86-peephole
3481 :    
3482 :     x86 Peephole fix by Fermin. Affects c-- and moby only.
3483 :    
3484 :     ----------------------------------------------------------------------
3485 : blume 658 Name: Matthias Blume
3486 :     Date: 2000/06/12 11:40:00
3487 :     Tag: blume-20000612-parmakefix
3488 :     Description:
3489 :    
3490 :     More cleanup after changing the file naming scheme: This time I
3491 :     repaired the parallel make mechanism for CMB.make which I broke earlier.
3492 :    
3493 :     ----------------------------------------------------------------------
3494 : leunga 657 Name: Allen Leung
3495 :     Date: 2000/06/09 01:25:00
3496 :     Tag: leunga-20000609-various
3497 :    
3498 :     None of these things should affect normal SML/NJ operations
3499 :    
3500 :     1. Peephole improvements provided by Fermin (c--)
3501 :     2. New annotation DEFUSE for adding extra dependence (moby)
3502 :     3. New X86 LOCK instructions (moby)
3503 :     4. New machine description language for reservation tables (scheduling)
3504 :     5. Fixes to various optimization/analysis modules (branch chaining, dominator
3505 :     trees etc.)
3506 :     6. I've changed the CM files so that they can work with versions
3507 :     110.0.6, 110.25 and 110.28
3508 :    
3509 :     ----------------------------------------------------------------------
3510 : blume 652 Name: Matthias Blume
3511 : blume 656 Date: 2000/06/09 12:40:00
3512 :     Tag: blume-20000609-log
3513 :     Description:
3514 :    
3515 :     - Removed all(?) remaining RCS Log entries from sources.
3516 :    
3517 :     - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
3518 :     anchored paths).
3519 :    
3520 :     ----------------------------------------------------------------------
3521 :     Name: Matthias Blume
3522 : blume 653 Date: 2000/06/07 17:00:00 JST
3523 :     Tag: blume-20000607-no-implicit-anchors
3524 :     Description:
3525 :    
3526 :     1. This update changes the default setting for
3527 :     CM.Control.implicit_anchors from true to false. This means that
3528 :     implicit anchors are no longer permitted by default. I also tried to
3529 :     make sure that nothing else still relies on implicit anchors.
3530 :     (This is the next step on the schedule towards a CM that does not even
3531 :     have the notion of implicit anchors anymore.)
3532 :    
3533 :     2. More CM manual updates.
3534 :    
3535 :     3. I managed to track down and fix the pickling bug I mentioned last
3536 :     time. Because of the previously existing workaround, this entails no
3537 :     immediate practical changes.
3538 :    
3539 :     ----------------------------------------------------------------------
3540 :     Name: Matthias Blume
3541 : blume 652 Date: 2000/06/06 11:15:00 JST
3542 :     Tag: blume-20000606-lazierpickle
3543 :     Description:
3544 :    
3545 :     !!!! NEW BOOT FILES !!!!
3546 :    
3547 :     * The main purpose of this update is to make library pickles lazier in
3548 :     order to reduce the initial space penalty for autoloading a library.
3549 :     As a result, it is now possible to have $smlnj/compiler.cm
3550 :     pre-registered. This should take care of the many complaints or
3551 :     inquiries about missing structure Compiler. This required changes to
3552 :     CM's internal data structures and small tweaks to some algorithms.
3553 :    
3554 :     As a neat additional effect, it is no longer necessary (for the sake
3555 :     of lean heap image files) to distinguish between a "minimal" CM and a
3556 :     "full" CM. Now, there is only one CM (i.e., the "full" version:
3557 :     $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
3558 :     interactive top level. ($smlnj/cm/minimal.cm is gone.)
3559 :    
3560 :     To make the life of compiler-hackers easier, "makeml" now also
3561 :     pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm). In other
3562 :     words, after you bootstrap a new sml for the first time, you will not
3563 :     have to autoload $smlnj/cmb.cm again afterwards. (The first time
3564 :     around you will still have to do it, though.)
3565 :    
3566 :     * A second change consists of major updates to the CM manual. There
3567 :     are now several appendices with summary information and also a full
3568 :     specification of the CM description file syntax.
3569 :    
3570 :     * In directory src/system I added the script "allcross". This script
3571 :     invokes sml and cross-compiles the compiler for all supported
3572 :     architectures. (Useful when providing a new set of boot files.)
3573 :    
3574 :     * There seems to be a latent bug in my "lazy pickles" mechanism. I
3575 :     added a small tweak to pickle-util.sml to work around this problem,
3576 :     but it is not a proper fix yet. I will investigate further. (The
3577 :     effect of the bug was an inflation of library pickle size.)
3578 :    
3579 :     * Version number increased to 110.28.1 (to avoid compatibility problems).
3580 :    
3581 :     ----------------------------------------------------------------------
3582 : leunga 646 Name: Allen Leung
3583 : leunga 648 Date: 2000/05/25 17:28 EDT
3584 :     Tag: leunga-20000525-ra
3585 :     Description:
3586 :    
3587 :     Fixed a bug in freezing phase of the register allocator.
3588 :    
3589 :     ----------------------------------------------------------------------
3590 :     Name: Allen Leung
3591 : leunga 647 Date: 2000/05/15 22:53 EDT
3592 : leunga 646 Tag: leunga-20000515-alpha-x86-ra
3593 :     Description:
3594 :    
3595 :     1. Alpha
3596 :    
3597 :     Slight cleanup. Removed the instruction SGNXL
3598 :    
3599 :     2. X86
3600 :    
3601 :     Added the following instructions to the instruction set:
3602 :    
3603 :     ROLx, RORx,
3604 :     BTx, BTSx, BTLx, BTRx,
3605 :     XCHGx, and variants with the LOCK prefix
3606 :    
3607 :     3. Register Allocation
3608 :    
3609 :     The module ra-rewrite-with-renaming has been improved.
3610 :    
3611 : leunga 647 These have no effect on SML/NJ.
3612 :    
3613 : leunga 646 ----------------------------------------------------------------------
3614 : blume 642 Name: Matthias Blume
3615 : blume 645 Date: 2000/05/15 16:20:00 JST
3616 :     Tag: blume-20000515-lightrebuild
3617 :     Description:
3618 :    
3619 :     1. I added an alternative to "-rebuild" to "makeml". The difference is
3620 :     that prior to calling CMB.make' the CM-variable "LIGHT" will be
3621 :     defined. In effect, the command will not build any cross-compiler
3622 :     backends and therefore finish more quickly.
3623 :    
3624 :     The "fixpt" script also takes a "-light" switch to be able to use
3625 :     this new facility while compiling for a fixpoint.
3626 :    
3627 :     2. I replaced all mentions of anchored paths in group owner specifications
3628 :     with simple relative paths (usually starting with "..").
3629 :     The rationale is that a library's internal workings should not be
3630 :     compromised by the lack of some anchor. (An anchor is necessary
3631 :     for someone who wants to refer to the library by an anchored path,
3632 :     but it should not be necessary to build the same library in the first
3633 :     place.)
3634 :    
3635 :     3. I changed the way CM's tool mechanism determines the shell command
3636 :     string used for things like ml-yacc etc. so that it does not break
3637 :     when CM.Control.implicit_anchors is turned off.
3638 :    
3639 :     ----------------------------------------------------------------------
3640 :     Name: Matthias Blume
3641 : blume 644 Date: 2000/05/12 18:20:00 JST
3642 :     Tag: blume-20000512-ml-build
3643 :     Description:
3644 :    
3645 :     Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
3646 :     getting installed properly (by config/install.sh).
3647 :    
3648 :     ----------------------------------------------------------------------
3649 :     Name: Matthias Blume
3650 : blume 643 Date: 2000/05/12 17:30:00 JST
3651 :     Tag: blume-20000512-anchors
3652 :     Description:
3653 :    
3654 :     !!! NEW BOOT FILES !!!
3655 :    
3656 :     This change is in preparation of fading out support for "implicitly
3657 :     anchored path names". I went through all sources and used the
3658 :     explicit (and relatively new) $-notation. See system/README and the
3659 :     CM manual for more info on this.
3660 :    
3661 :     I also modified the anchoring scheme for some things such as "smlnj",
3662 :     "MLRISC", "cm", etc. to take advantage of the fact that explicit
3663 :     anchors are more expressive: anchor name and first arc do not have to
3664 :     coincide. This entails the following user-visible change:
3665 :    
3666 :     You have to write $smlnj/foo/bar instead of smlnj/foo/bar. In
3667 :     particular, when you fire up sml with a command-line argument, say,
3668 :     e.g.:
3669 :    
3670 :     sml '$smlnj/cmb.cm'
3671 :    
3672 :     At the ML toplevel prompt:
3673 :    
3674 :     CM.autoload "$smlnj/cmb.cm";
3675 :    
3676 :     There is also a new controller in CM.Control that can be used to turn
3677 :     off all remaining support for implicit anchors by saying:
3678 :    
3679 :     CM.autoload "$smlnj/
3680 :     #set CM.Control.implicit_anchors false;
3681 :    
3682 :     This causes CM to reject implicitly anchored paths. This is (for the
3683 :     time being) less permissive than the "final" version where there will
3684 :     be no more such implicit anchors and relative paths will be just that:
3685 :     relative.
3686 :    
3687 :     The next step (version after next version?) will be to make the
3688 :     default for CM.Control.implicit_anchors false. After the dust has
3689 :     settled, I can then produce the "final" version of this...
3690 :    
3691 :     Note: Since bootstrapping is a bit tricky, I provided new boot files.
3692 :    
3693 :     ----------------------------------------------------------------------
3694 :     Name: Matthias Blume
3695 : blume 642 Date: 2000/05/11 16:30:00 JST
3696 :     Tag: blume-20000511-sources
3697 :     Description:
3698 :    
3699 :     The main change is that I added function CM.sources as a generalized
3700 :     version of the earlier CM.makedepend. This entails the following
3701 :     additional changes:
3702 :    
3703 :     - CM.makedepend has been dropped.
3704 :    
3705 :     - CM manual has been updated.
3706 :    
3707 :     - TOOLS signature and API have been changed.
3708 :    
3709 :     ----------------------------------------------------------------------
3710 : leunga 640 Name: Allen Leung
3711 : leunga 641 Date: 2000/05/10 21:17 EDT
3712 :     Tag: leunga-20000510-moby-c--ssa
3713 :     Description:
3714 :    
3715 :     Various bug fixes and new features for C--, Moby and MLRISC optimizations.
3716 :     None of these affect SML/NJ.
3717 :    
3718 :     1. Register Allocation
3719 :    
3720 :     a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
3721 :     This module tries to remove local (i.e. basic block level) redundancies
3722 :     during spilling.
3723 :    
3724 :     b. A new framework for performing region based register allocation.
3725 :     Not yet entirely functional.
3726 :    
3727 :     2. X86
3728 :    
3729 :     a. DefUse for POP was missing the stack pointer [found by Lal]
3730 :     b. Reload for CALL was incorrect in X86Spill [found by John]
3731 :     c. Various fixes in X86Spill so that it can be used correctly for
3732 :     the new spilling module.
3733 :    
3734 :     3. SSA/IR
3735 :    
3736 :     a. New module ir/dj-dataflow.sml implements elimination based
3737 :     data flow analysis.
3738 :    
3739 :     4. MLRiscGen
3740 :    
3741 :     a. Fix for gc type annotation
3742 :    
3743 :     5. MDGen
3744 :    
3745 :     Various fixes for machine description -> ml code translation. For ssa
3746 :     only.
3747 :    
3748 :     ----------------------------------------------------------------------
3749 :     Name: Allen Leung
3750 : leunga 640 Date: 2000/05/08 22:17 EDT
3751 :     Tag: leunga-20000508-labexp
3752 :     Description:
3753 :    
3754 :     Fermin has found a few assembly problems with constant expressions
3755 :     generated in LabelExp. Mostly, the problems involve extra parentheses,
3756 :     which choke on dumb assemblers. This is his fix.
3757 :    
3758 :     ----------------------------------------------------------------------
3759 : dbm 635 Name: Dave MacQueen
3760 :     Date: 2000/04/09 14:00 EDT
3761 :     Tag: dbm-20000502-Version_110_28
3762 :     Description:
3763 :    
3764 :     1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
3765 :    
3766 :     2. Updated config/version to 110.28
3767 :    
3768 :     3. Updated config/srcarchiveurl
3769 :    
3770 :     3. New boot files!
3771 :     ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
3772 :    
3773 :     ----------------------------------------------------------------------
3774 : blume 634 Name: Matthias Blume
3775 :     Date: 2000/05/01 19:05:00 JST
3776 :     Tag: blume-20000501-noweb
3777 :     Description:
3778 :    
3779 :     A new noweb tool has been added. The existing system is entirely
3780 :     unaffected by this, but some CM users have asked for renewed noweb
3781 :     support. Everything is documented in the CM manual.
3782 :    
3783 :     New (plugin) libraries:
3784 :    
3785 :     noweb-tool.cm
3786 :     nw-ext.cm
3787 :    
3788 :     ----------------------------------------------------------------------
3789 : dbm 633 Name: Dave MacQueen
3790 :     Date: 2000/04/30 12:40PM EDT
3791 :     Tag: dbm-20000430-bug_fixes
3792 :     Description:
3793 :    
3794 :     1. Fix for bug 1498
3795 :     smlnj/src/system/Basis/Implementation/Unsafe/object.sig
3796 :     smlnj/src/system/Basis/Implementation/Unsafe/object.sml
3797 :     added toRealArray function
3798 :     smlnj/src/compiler/MiscUtil/print/ppobj.sml
3799 :     added check for tag Obj.RealArray to array printing case in ppObj
3800 :    
3801 :     2. Fix for bug 1510
3802 :     smlnj/src/compiler/Semant/types/typesutil.sml
3803 :     fixed definition of dummyargs (used by equalTycon) so that
3804 :     dummy args are distinct types
3805 :    
3806 :     ----------------------------------------------------------------------
3807 : blume 629 Name: Matthias Blume
3808 : blume 632 Date: 2000/04/30 01:00:00 JST
3809 :     Tag: blume-20000430-versions
3810 :     Description:
3811 :    
3812 :     1. CM version numbering added. This is an implementation of Lal's
3813 :     proposal for adding version numbers and version checking to .cm
3814 :     files. Lal said that his proposal was just that -- a proposal.
3815 :     For the time being I went ahead and implemented it so that people
3816 :     can comment on it. Everything is completely backward-compatible
3817 :     (except for the stable library format, i.e., new bootfiles!).
3818 :    
3819 :     As usual, see the CM manual for details.
3820 :    
3821 :     2. An alternative syntax for anchored paths has been implemented.
3822 :     Dave has recently voiced the same concerns that I had when I did
3823 :     this, so there should be some support. My take is that eventually
3824 :     I will let support for the current syntax (where anchors are
3825 :     "implicit") fade out in favor of the new, explicit syntax.
3826 :     In order to be backward-compatible, both old and new syntax are
3827 :     currently supported.
3828 :    
3829 :     Again, see the CM manual for details.
3830 :    
3831 :     3. Parallel make is trying to be slightly smarter: When the master
3832 :     process finds a "bottleneck", i.e., when there is only one
3833 :     compilation unit that can be compiled and everybody else is
3834 :     waiting on it, then it will simply compile it directly instead
3835 :     of clumsily telling one of the slaves to do it.
3836 :    
3837 :     4. Support for "unsharing" added. This is necessary in order to be
3838 :     able to have two different versions of the same library running
3839 :     at the same time (e.g., for trying out a new MLRISC while still
3840 :     having the old MLRISC linked into the current compiler, etc.)
3841 :     See the CM manual.
3842 :    
3843 :     5. Simple "makedepend" functionality added for generating Makefile
3844 :     dependency information. (This is rather crude at the moment.
3845 :     Expect some changes here in the future.)
3846 :    
3847 :     6. ".fun" added as a recognized suffix for ML files. Also documented
3848 :     explicitly in the manual that the fallback behavior (unknown suffix
3849 :     -> ML file) is not an official feature!
3850 :    
3851 :     7. Small changes to the pickler for stable libraries.
3852 :    
3853 :     8. Several internal changes to CM (for cleanup/improvement).
3854 :    
3855 :    
3856 :     !!!! NEW BINFILES !!!!
3857 :    
3858 :     ----------------------------------------------------------------------
3859 :     Name: Matthias Blume
3860 : blume 631 Date: 2000/04/28 17:30:00 JST
3861 :     Tag: blume-20000428-pathconfig
3862 :     Description:
3863 :    
3864 :     1. I changed config/install.sh to remove duplicate entries from the
3865 :     lib/pathconfig file at the end. Moreover, the final version of
3866 :     lib/pathconfig is sorted alphabetically. The same (sorting) is done
3867 :     in src/system/installml.
3868 :    
3869 :     2. The config/install.sh script now consistently uses relative
3870 :     pathnames in lib/pathconfig whenever the anchor is in the lib
3871 :     directory. (So far this was true for the libraries that come
3872 :     pre-compiled and bundled as part of the bootfiles but not for
3873 :     libraries that are compiled by the script itself.)
3874 :    
3875 :     ----------------------------------------------------------------------
3876 :     Name: Matthias Blume
3877 : blume 629 Date: 2000/04/26 13:10:00 JST
3878 :     Tag: blume-20000426-fun_suffix
3879 :     Description:
3880 :    
3881 :     Added ".fun" as a recognized file name suffix (for ML code).
3882 :    
3883 :     ----------------------------------------------------------------------
3884 : leunga 628 Name: Allen Leung
3885 :     Date: 2000/04/25 17:00:00 EST
3886 :     Tag: leunga-20000425-alpha-ra
3887 :     Description:
3888 :    
3889 :     1. Alpha
3890 :    
3891 :     PSEUDOARITH was missing in AlphaRewrite. This causes an endless loop
3892 :     in C--.
3893 :    
3894 :     2. RA
3895 :    
3896 :     Added a flag "ra-dump-size" to print out the size of the flowgraph
3897 :     and the interference graph.
3898 :    
3899 :     ----------------------------------------------------------------------
3900 : dbm 627 Name: Dave MacQueen
3901 :     Date: 2000/04/25/
3902 :     Tag: dbm-20000425-mlyacc_doc_examples
3903 :     Description:
3904 :     Updated mlyacc.tex sections 5 and 7 for SML '97 and CM.
3905 :     Updated all three examples in src/ml-yacc/examples to run
3906 :     under 110.* using CM.make.
3907 :    
3908 :     ----------------------------------------------------------------------
3909 : leunga 624 Name: Allen Leung
3910 :     Date: 2000/04/20 23:04:00 EST
3911 :     Tag: leunga-20000420-ssa-c---stuff
3912 :     Description:
3913 :    
3914 :     This update synchronizes my repository with Yale's. Most of these
3915 :     changes, however, do not affect SML/NJ at all (the RA is an exception).
3916 :    
3917 :     1. Register Allocator
3918 :    
3919 :     a. An improvement in the interference graph construction:
3920 :     Given a copy
3921 :    
3922 :     s <- t
3923 :    
3924 : leunga 628 no interference edge between s and t is added for this definition of s.
3925 : leunga 624
3926 :     b. I've added two new spill heuristic modules that Fermin and I developed
3927 :     (in the new library RA.cm). These are unused in SML/NJ but maybe
3928 :     useful for others (Moby?)
3929 :    
3930 :     2. X86
3931 :    
3932 :     a. Various fixes in the backend provided by Fermin [C--] and Lal.
3933 :    
3934 :     3. Alpha
3935 :    
3936 :     a. Added the BSR instruction and code generation that goes with it [C--]
3937 :     b. Other fixes too numerous to recount provided by Fermin [C--]
3938 :    
3939 :     4. Regmaps
3940 :    
3941 :     a. The regmaps are not initialized with the identity physical bindings
3942 :     at creation time. This is unneeded.
3943 :    
3944 :     5. MLRISC Optimizations
3945 :    
3946 :     a. The DJ-Graph module can now compute the iterated dominance frontiers
3947 :     intersects with liveness incrementally in linear time! Woohoo!
3948 :     This is now used in my new SSA construction algorithm.
3949 :    
3950 :     b. THe branch reorganization module is now smarter about linear chains of
3951 :     basic blocks.
3952 :    
3953 :    
3954 :     ----------------------------------------------------------------------
3955 : blume 615 Name: Matthias Blume
3956 :     Date: 2000/04/12 13:52:00 JST
3957 :     Tag: blume_main_v110p27_1
3958 :     Description:
3959 :    
3960 :     Changed install.sh script to handle archive files without version number
3961 :     and to use "boot.<arch>-<os>" instead of "sml.boot.<arch>-<os>" for the
3962 :     name of the boot file archive.
3963 :    
3964 :     ----------------------------------------------------------------------
3965 : dbm 607 Name: Dave MacQueen
3966 :     Date: 2000/04/09 14:00 EDT
3967 :     Tag: dbm-20000410-Version_110_27
3968 :     Description:
3969 :    
3970 :     1. Updated src/compiler/TopLevel/main/version.sml to version 110.27
3971 :    
3972 :     2. Updated src/config/version to 110.27
3973 :    
3974 :     3. New boot files!
3975 :    
3976 :     ----------------------------------------------------------------------
3977 : leunga 606 Name: Allen Leung
3978 :     Date: 2000/04/09 19:09:00 EST
3979 :     Tag: leunga-20000409-misc
3980 :     Description:
3981 :    
3982 :     1. Yet another fix for x86 assembly for idivl, imull, mull and friends.
3983 :    
3984 :     2. Miscellaneous improvements to MLRISC (unused in sml/nj)
3985 :    
3986 :     ----------------------------------------------------------------------
3987 : monnier 605 Name: Stefan
3988 :     Date: 2000/04/07 10:00:00 EDT
3989 :     Tag: monnier-20000406-branch-handling
3990 :     Description:
3991 :    
3992 :     Improved handling of branches (mostly those generated from
3993 :     polymorphic equality), removed switchoff and changed the
3994 :     default optimization settings (more cpsopt and less flintopt).
3995 :    
3996 :     ----------------------------------------------------------------------
3997 : leunga 601 Name: Allen Leung
3998 : leunga 602 Date: 2000/04/06 01:30:00 EST
3999 :     Tag: leunga-20000406-peephole-x86-SSA-2
4000 :     Description:
4001 :    
4002 :     Forgot a few files.
4003 :    
4004 :     ----------------------------------------------------------------------
4005 :     Name: Allen Leung
4006 : leunga 601 Date: 2000/04/06 00:36:00 EST
4007 :     Tag: leunga-20000406-peephole-x86-SSA
4008 :     Description:
4009 :    
4010 :     1. New Peephole code
4011 :    
4012 :     2. Minor improvement to X86 instruction selection
4013 :    
4014 :     3. Various fixes to SSA and machine description -> code translator
4015 :    
4016 :     ----------------------------------------------------------------------
4017 : blume 595 Name: Matthias Blume
4018 :     Date: 2000/04/05 12:30:00 JST
4019 :     Tag: blume_main_v110p26p2_3
4020 :     Description:
4021 :    
4022 :     This update just merges three minor cosmetic updates to CM's sources
4023 :     to get ready for the 110.27 code freeze on Friday. No functionality
4024 :     has changed.
4025 :    
4026 :     ----------------------------------------------------------------------
4027 : leunga 593 Name: Allen Leung
4028 : leunga 594 Date: 2000/04/04 19:39:00 EST
4029 :     Tag: leunga-20000404-x86-asm
4030 :     Description:
4031 :    
4032 :     1. Fixed a problem in X86 assembly.
4033 :    
4034 :     Things like
4035 :    
4036 :     jmp %eax
4037 :     jmp (%eax)
4038 :    
4039 :     should be output as
4040 :    
4041 :     jmp *%eax
4042 :     jmp *(%eax)
4043 :    
4044 :     2. Assembly output
4045 :    
4046 :     Added a new flag
4047 :    
4048 :     "asm-indent-copies" (default to false)
4049 :    
4050 :     When this flag is on, parallel copies will be indented an extra level.
4051 :    
4052 :     ----------------------------------------------------------------------
4053 :     Name: Allen Leung
4054 : leunga 593 Date: 2000/04/04 03:18:00 EST
4055 :     Tag: leunga-20000404-C--Moby
4056 :     Description:
4057 :    
4058 :     All of these fixes are related to C--, Moby, and my own optimization
4059 :     stuff; so they shouldn't affect SML/NJ.
4060 :    
4061 :     1. X86
4062 :    
4063 :     Various fixes related floating point, and extensions.
4064 :    
4065 :     2. Alpha
4066 :    
4067 :     Some extra patterns related to loads with signed/zero extension
4068 :     provided by Fermin.
4069 :    
4070 :     3. Assembly
4071 :    
4072 : monnier 659 When generating assembly, resolve the value of client defined constants,
4073 : leunga 593 instead of generating symbolic values. This is controlled by the
4074 :     new flag "asm-resolve-constants", which is default to true.
4075 :    
4076 :     4. Machine Descriptions
4077 :    
4078 :     a. The precedence parser was slightly broken when parsing infixr symbols.
4079 :     b. The type generalizing code had the bound variables reversed, resulting
4080 :     in a problem during arity raising.
4081 :     c. Various fixes in machine descriptions.
4082 :    
4083 :     ----------------------------------------------------------------------
4084 : blume 592 Name: Matthias Blume
4085 :     Date: 2000/04/03 16:05:00 JST
4086 :     Tag: blume_main_v110p26p2_2
4087 :     Description:
4088 :    
4089 :     I eliminated coreEnv from compInfo. Access to the "Core" structure is
4090 :     now done via the ordinary static environment that is context to each
4091 :     compilation unit.
4092 :    
4093 :     To this end, I arranged that instead of "structure Core" as "structure
4094 :     _Core" is bound in the pervasive environment. Core access is done via
4095 : monnier 659 _Core (which can never be accidentally rebound because _Core is not a
4096 : blume 592 legal surface-syntax symbol).
4097 :    
4098 :     The current solution is much cleaner because the core environment is
4099 :     now simply part of the pervasive environment which is part of every
4100 :     compilation unit's context anyway. In particular, this eliminates all
4101 :     special-case handling that was necessary until now in order to deal
4102 :     with dynamic and symbolic parts of the core environment.
4103 :    
4104 :     Remaining hackery (to bind the "magic" symbol _Core) is localized in the
4105 : monnier 659 compilation manager's bootstrap compiler (actually: in the "init group"
4106 : blume 592 handling). See the comments in src/system/smlnj/init/init.cmi for
4107 :     more details.
4108 :    
4109 :     I also tried to track down all mentions of "Core" (as string argument
4110 :     to Symbol.strSymbol) in the compiler and replaced them with a
4111 :     reference to the new CoreSym.coreSym. Seems cleaner since the actual
4112 :     name appears in one place only.
4113 :    
4114 :     Binfile and bootfile format have not changed, but the switchover from
4115 :     the old "init.cmi" to the new one is a bit tricky, so I supplied new
4116 :     bootfiles anyway.
4117 :    
4118 :     ----------------------------------------------------------------------
4119 : leunga 591 Name: Allen Leung
4120 :     Date: 2000/04/02 21:17:00 EST
4121 :     Tag: leunga-20000402-mltree
4122 :     Description:
4123 : leunga 585
4124 : leunga 591 1. Renamed the constructor CALL in MLTREE by popular demand.
4125 :     2. Added a bunch of files from my repository. These are currently
4126 :     used by other non-SMLNJ backends.
4127 :    
4128 : leunga 576 ----------------------------------------------------------------------
4129 : leunga 590 Name: Allen Leung
4130 :     Date: 2000/03/31 21:15:00 EST
4131 :     Tag: leunga-20000331-aliasing
4132 :     Description:
4133 :    
4134 :     This update contains a rewritten (and hopefully more correct) module
4135 :     for extracting aliasing information from CPS.
4136 :    
4137 :     To turn on this feature:
4138 :    
4139 :     Compiler.Control.CG.memDisambiguate := true
4140 :    
4141 :     To pretty print the region information with assembly
4142 :    
4143 :     Compiler.Control.MLRISC.getFlag "asm-show-region" := true;
4144 :    
4145 :     To control how many levels of aliasing information are printed, use:
4146 :    
4147 :     Compiler.Control.MLRISC.getInt "points-to-show-level" := n
4148 :    
4149 :     The default of n is 3.
4150 :    
4151 :     ----------------------------------------------------------------------
4152 : dbm 589 Name: David MacQueen
4153 :     Date: 2000/03/31 11:15:00 EST
4154 :     Tag: dbm-20000331-runtime_fix
4155 :     Description:
4156 :    
4157 :     This update contains:
4158 :    
4159 :     1. runtime/c-lib/c-libraries.c
4160 :     includes added in revision 1.2 caused compilation errors on hppa-hpux
4161 :    
4162 :     2. fix for bug 1556
4163 :     system/Basis/Implementation/NJ/internal-signals.sml
4164 :    
4165 :     ----------------------------------------------------------------------
4166 : blume 587 Name: Matthias Blume
4167 : blume 588 Date: 2000/03/31 18:00:00 JST
4168 :     Tag: blume_main_v110p26p2_1
4169 :     Description:
4170 :    
4171 :     This update contains:
4172 :    
4173 :     1. A small change to CM's handling of stable libraries:
4174 :     CM now maintains one "global" modmap that is used for all stable
4175 :     libraries. The use of such a global modmap maximizes sharing and
4176 :     minimizes the need for re-traversing parts of environments during
4177 :     modmap construction. (However, this has minor impact since modmap
4178 :     construction seems to account for just one percent or less of total
4179 :     compile time.)
4180 :    
4181 :     2. I added a "genmap" phase to the statistics. This is where I got the
4182 :     "one percent" number (see above).
4183 :    
4184 :     3. CM's new tool parameter mechanism just became _even_ better. :)
4185 :     - The parser understands named parameters and recursive options.
4186 :     - The "make" and "shell" tools use these new features.
4187 :     (This makes it a lot easier to cascade these tools.)
4188 :     - There is a small syntax change: named parameters use a
4189 :    
4190 :     <name> : ( <option> ... ) or
4191 :     <name> : <string>
4192 :    
4193 :     syntax. Previously, named parameters were implemented in an
4194 :     ad-hoc fashion by each tool individually (by parsing strings)
4195 :     and had the form
4196 :    
4197 :     <name>=<string>
4198 :    
4199 :     See the CM manual for a full description of these issues.
4200 :    
4201 :     ----------------------------------------------------------------------
4202 :     Name: Matthias Blume
4203 : blume 587 Date: 2000/03/30 18:00:00 JST
4204 :     Tag: blume_main_v110p26p2_0
4205 :     Description:
4206 :    
4207 :     !!!!! WARNING !!!!!!
4208 :     !! New binfiles !!
4209 :     !!!!!!!!!!!!!!!!!!!!
4210 :    
4211 :     This update contains:
4212 :    
4213 :     1. Moderate changes to CM:
4214 :    
4215 :     - Changes to CM's tools mechanism. In particular, it is now possible
4216 :     to have tools that accept additional "command line" parameters
4217 :     (specified in the .cm file at each instance where the tool's class is
4218 :     used).
4219 :    
4220 : monnier 659 This was done to accommodate the new "make" and "shell" tools which
4221 :     facilitate fairly seamless hookup to portions of code managed using
4222 : blume 587 Makefiles or Shell scripts.
4223 :    
4224 :     There are no classes "shared" or "private" anymore. Instead, the
4225 :     sharing annotation is now a parameter to the "sml" class.
4226 :    
4227 :     There is a bit of generic machinery for implementing one's own
4228 :     tools that accept command-line parameters. However, I am not yet fully
4229 :     satisfied with that part, so expect changes here in the future.
4230 :    
4231 :     All existing tools are described in the CM manual.
4232 :    
4233 : monnier 659 - Slightly better error handling. (CM now suppresses many followup
4234 : blume 587 error messages that tended to be more annoying than helpful.)
4235 :    
4236 :     2. Major changes to the compiler's static environment data structures.
4237 :    
4238 :     - no CMStaticEnv anymore.
4239 :     - no CMEnv, no "BareEnvironment" (actually, _only_ BareEnvironment,
4240 :     but it is called Environment), no conversions between different
4241 :     kinds of static environments
4242 :    
4243 :     - There is still a notion of a "modmap", but such modmaps are generated
4244 :     on demand at the time when they are needed. This sounds slow, but I
4245 :     sped up the code that generates modmaps enough for this not to lead to
4246 :     a slowdown of the compiler (at least I didn't detect any).
4247 :    
4248 :     - To facilitate rapid modmap generation, static environments now
4249 :     contain an (optional) "modtree" structure. Modtree annotations are
4250 :     constructed by the unpickler during unpickling. (This means that
4251 :     the elaborator does not have to worry about modtrees at all.)
4252 :     Modtrees have the advantage that they are compositional in the same
4253 :     way as the environment data structure itself is compositional.
4254 :     As a result, modtrees never hang on to parts of an environment that
4255 :     has already been rendered "stale" by filtering or rebinding.
4256 :    
4257 :     - I went through many, many trials and errors before arriving at the
4258 :     current solution. (The initial idea of "linkpaths" did not work.)
4259 :     But the result of all this is that I have touched a lot of files that
4260 :     depend on the "modules" and "types" data structures (most of the
4261 :     elaborator). There were a lot of changes during my "linkpath" trials
4262 :     that could have been reverted to their original state but weren't.
4263 :     Please, don't be too harsh on me for messing with this code a bit more
4264 : monnier 921 than what was strictly necessary... (I _did_ resist the temptation
4265 : blume 587 of doing any "global reformatting" to avoid an untimely death at
4266 :     Dave's hands. :)
4267 :    
4268 :     - One positive aspect of the previous point: At least I made sure that
4269 :     all files that I touched now compile without warnings (other than
4270 :     "polyEqual").
4271 :    
4272 :     - compiler now tends to run "leaner" (i.e., ties up less memory in
4273 :     redundant modmaps)
4274 :    
4275 :     ----------------------------------------------------------------------
4276 : leunga 580 Name: Allen Leung
4277 : leunga 585 Date: 2000/03/29 18:00:00
4278 :     Tag: leunga-20000327-mlriscGen_hppa_alpha_x86
4279 : leunga 586 Boot files (optional): ftp://react-ilp.cs.nyu.edu/leunga/110.26.1-sml.boot.x86-unix-20000330.tar.gz
4280 : leunga 585 Description:
4281 :    
4282 :     This update contains *MAJOR* changes to the way code is generated from CPS
4283 :     in the module mlriscGen, and in various backend modules.
4284 :    
4285 :     CHANGES
4286 :     =======
4287 :    
4288 :     1. MLRiscGen: forward propagation fix.
4289 :    
4290 :     There was a bug in forward propagation introduced at about the same time
4291 :     as the MLRISC x86 backend, which prohibits coalescing to be
4292 :     performed effectively in loops.
4293 :    
4294 :     Effect: speed up of loops in RISC architectures.
4295 :     By itself, this actually slowed down certain benchmarks on the x86.
4296 :    
4297 :     2. MLRiscGen: forward propagating addresses from consing.
4298 :    
4299 :     I've changed the way consing code is generated. Basically I separated
4300 :     out the initialization part:
4301 :    
4302 :     store tag, offset(allocptr)
4303 :     store elem1, offset+4(allocptr)
4304 :     store elem2, offset+8(allocptr)
4305 :     ...
4306 :     store elemn, offset+4n(allocptr)
4307 :    
4308 :     and the address computation part:
4309 :    
4310 :     celladdr <- offset+4+alloctpr
4311 :    
4312 :     and move the address computation part
4313 :    
4314 :     Effect: register pressure is generally lower as a result. This
4315 :     makes compilation of certain expressions much faster, such as
4316 :     long lists with non-trivial elements.
4317 :    
4318 :     [(0,0), (0,0), .... (0,0)]
4319 :    
4320 :     3. MLRiscGen: base pointer elimination.
4321 :    
4322 :     As part of the linkage mechanism, we generate the sequence:
4323 :    
4324 :     L: ... <- start of the code fragment
4325 :    
4326 :     L1:
4327 :     base pointer <- linkreg - L1 + L
4328 :    
4329 :     The base pointer was then used for computing relocatable addresses
4330 :     in the code fragment. Frequently (such as in lots of continuations)
4331 :     this is not needed. We now eliminate this sequence whenever possible.
4332 :    
4333 :     For compile time efficiency, I'm using a very stupid local heuristic.
4334 :     But in general, this should be done as a control flow analysis.
4335 :    
4336 :     Effect: Smaller code size. Speed up of most programs.
4337 :    
4338 :     4. Hppa back end
4339 :    
4340 :     Long jumps in span dependence resolution used to depend on the existence
4341 :     of the base pointer.
4342 :    
4343 :     A jump to a long label L was expanded into the following sequence:
4344 :    
4345 :     LDIL %hi(L-8192), %r29
4346 :     LDO %lo(L-8192)(%r29), %r29
4347 :     ADD %r29, baseptr, %r29
4348 :     BV,n %r0(%r29)
4349 :