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Annotation of /sml/branches/primop-branch-3/NOTES/HISTORY

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Original Path: sml/trunk/HISTORY

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 1142
15 : george 1136 ----------------------------------------------------------------------
16 : blume 1145 Name: Matthias Blume
17 : blume 1148 Date: 2002/03/15 16:40:00 EST
18 :     Tag: blume-20020315-basis
19 :     Description:
20 :    
21 :     Provided (preliminary?) implementations for
22 :    
23 :     {String,Substring}.{concatWith,isSuffix,isSubstring}
24 :    
25 :     and
26 :    
27 :     Substring.full
28 :    
29 :     Those are in the Basis spec but they were missing in SML/NJ.
30 :    
31 :     ----------------------------------------------------------------------
32 :     Name: Matthias Blume
33 : blume 1145 Date: 2002/03/14 21:30:00 EST
34 :     Tag: blume-20020314-controls
35 :     Description:
36 :    
37 :     Controls:
38 :     ---------
39 :    
40 :     1. Factored out the recently-added Controls : CONTROLS stuff and put
41 :     it into its own library $/controls-lib.cm. The source tree for
42 :     this is under src/smlnj-lib/Controls.
43 :    
44 :     2. Changed the names of types and functions in this interface, so they
45 :     make a bit more "sense":
46 :    
47 :     module -> registry
48 :     'a registry -> 'a group
49 :    
50 :     3. The interface now deals in ref cells only. The getter/setter interface
51 :     is (mostly) gone.
52 :    
53 :     4. Added a function that lets one register an already-existing ref cell.
54 :    
55 :     5. Made the corresponding modifications to the rest of the code so that
56 :     everything compiles again.
57 :    
58 :     6. Changed the implementation of Controls.MLRISC back to something closer
59 :     to the original. In particular, this module (and therefore MLRISC)
60 :     does not depend on Controls. There now is some link-time code in
61 :     int-sys.sml that registers the MLRISC controls with the Controls
62 :     module.
63 :    
64 :     CM:
65 :     ---
66 :    
67 :     * One can now specify the lambda-split aggressiveness in init.cmi.
68 :    
69 :     ----------------------------------------------------------------------
70 : leunga 1142 Name: Allen Leung
71 :     Date: 2002/03/13 17:30:00 EST
72 :     Tag: leunga-20020313-x86-fp-unary
73 :     Description:
74 :    
75 :     Bug fix for:
76 :    
77 :     > leunga@weaselbane:~/Yale/tmp/sml-dist{21} bin/sml
78 :     > Standard ML of New Jersey v110.39.1 [FLINT v1.5], March 08, 2002
79 :     > - fun f(x,(y,z)) = Real.~ y;
80 :     > [autoloading]
81 :     > [autoloading done]
82 :     > fchsl (%eax), 184(%esp)
83 :     > Error: MLRisc bug: X86MCEmitter.emitInstr
84 :     >
85 :     > uncaught exception Error
86 :     > raised at: ../MLRISC/control/mlriscErrormsg.sml:16.14-16.19
87 :    
88 :     The problem was that the code generator did not generate any fp registers
89 :     in this case, and the ra didn't know that it needed to run the X86FP phase to
90 :     translate the pseudo fp instruction. This only happened with unary fp
91 :     operators in certain situations.
92 :    
93 :     ----------------------------------------------------------------------
94 : blume 1137 Name: Matthias Blume
95 : blume 1140 Date: 2002/03/13 14:00:00 EST
96 :     Tag: blume-20020313-overload-etc
97 :     Description:
98 :    
99 :     1. Added _overload as a synonym for overload for backward compatibility.
100 :     (Control.overloadKW must be true for either version to be accepted.)
101 :    
102 :     2. Fixed bug in install script that caused more things to be installed
103 :     than what was requested in config/targets.
104 :    
105 :     3. Made CM aware of the (_)overload construct so that autoloading
106 :     works.
107 :    
108 :     ----------------------------------------------------------------------
109 :     Name: Matthias Blume
110 : blume 1138 Date: 2002/03/12 22:03:00 EST
111 :     Tag: blume-20020312-url
112 :     Description:
113 :    
114 :     Forgot to update BOOT and srcarchiveurl.
115 :    
116 :     ----------------------------------------------------------------------
117 :     Name: Matthias Blume
118 : blume 1137 Date: 2002/03/12 17:30:00 EST
119 :     Tag: blume-20020312-version110392
120 :     Description:
121 :    
122 :     Yet another version number bump (because of small changes to the
123 :     binfile format). Version number is now 110.39.2. NEW BOOTFILES!
124 :    
125 :     Changes:
126 :    
127 :     The new pid generation scheme described a few weeks ago was overly
128 :     complicated. I implemented a new mechanism that is simpler and
129 :     provides a bit more "stability": Once CM has seen a compilation
130 :     unit, it keeps its identity constant (as long as you do not delete
131 :     those crucial CM/GUID/* files). This means that when you change
132 : blume 1145 an interface, compile, then go back to the old interface, and
133 : blume 1137 compile again, you arrive at the original pid.
134 :    
135 :     There now also is a mechanism that instructs CM to use the plain
136 :     environment hash as a module's pid (effectively making its GUID
137 :     the empty string). For this, "noguid" must be specified as an
138 :     option to the .sml file in question within its .cm file.
139 :     This is most useful for code that is being generated by tools such
140 :     as ml-nlffigen (because during development programmers tend to
141 :     erase the tool's entire output directory tree including CM's cached
142 :     GUIDs). "noguid" is somewhat dangerous (since it can be used to locally
143 :     revert to the old, broken behavior of SML/NJ, but in specific cases
144 :     where there is no danger of interface confusion, its use is ok
145 :     (I think).
146 :    
147 :     ml-nlffigen by default generates "noguid" annotations. They can be
148 :     turned off by specifying -guid in its command line.
149 :    
150 :     ----------------------------------------------------------------------
151 : george 1136 Name: Lal George
152 :     Date: 2002/03/12 12 14:42:36 EST
153 :     Tag: george-20020312-frequency-computation
154 :     Description:
155 :    
156 :     Integrated jump chaining and static block frequency into the
157 :     compiler. More details and numbers later.
158 : leunga 1025
159 : george 1003 ----------------------------------------------------------------------
160 : george 1133 Name: Lal George
161 :     Date: 2002/03/11 11 22:38:53 EST
162 :     Tag: george-20020311-jump-chain-elim
163 :     Description:
164 :    
165 :     Tested the jump chain elimination on all architectures (except the
166 :     hppa). This is on by default right now and is profitable for the
167 :     alpha and x86, however, it may not be profitable for the sparc and ppc
168 :     when compiling the compiler.
169 :    
170 :     The gc test will typically jump to a label at the end of the cluster,
171 :     where there is another jump to an external cluster containing the actual
172 :     code to invoke gc. This is to allow factoring of common gc invocation
173 :     sequences. That is to say, we generate:
174 :    
175 :     f:
176 :     testgc
177 :     ja L1 % jump if above to L1
178 :    
179 :     L1:
180 :     jmp L2
181 :    
182 :    
183 :     After jump chain elimination the 'ja L1' instructions is converted to
184 :     'ja L2'. On the sparc and ppc, many of the 'ja L2' instructions may end
185 :     up being implemented in their long form (if L2 is far away) using:
186 :    
187 :     jbe L3 % jump if below or equal to L3
188 :     jmp L2
189 :     L3:
190 :     ...
191 :    
192 :    
193 :     For large compilation units L2 may be far away.
194 :    
195 :    
196 :     ----------------------------------------------------------------------
197 : blume 1132 Name: Matthias Blume
198 :     Date: 2002/03/11 13:30:00 EST
199 :     Tag: blume-20020311-mltreeeval
200 :     Description:
201 :    
202 :     A functor parameter was missing.
203 :    
204 :     ----------------------------------------------------------------------
205 : leunga 1130 Name: Allen Leung
206 : leunga 1131 Date: 2002/03/11 10:30:00 EST
207 : leunga 1142 Tag: leunga-20020311-runtime-string0
208 : leunga 1131 Description:
209 :    
210 :     The representation of the empty string now points to a
211 :     legal null terminated C string instead of unit. It is now possible
212 :     to convert an ML string into C string with InlineT.CharVector.getData.
213 :     This compiles into one single machine instruction.
214 :    
215 :     ----------------------------------------------------------------------
216 :     Name: Allen Leung
217 : leunga 1130 Date: 2002/03/10 23:55:00 EST
218 :     Tag: leunga-20020310-x86-call
219 :     Description:
220 :    
221 :     Added machine generation for CALL instruction (relative displacement mode)
222 :    
223 :     ----------------------------------------------------------------------
224 : blume 1128 Name: Matthias Blume
225 :     Date: 2002/03/08 16:05:00
226 :     Tag: blume-20020308-entrypoints
227 :     Description:
228 :    
229 :     Version number bumped to 110.39.1. NEW BOOTFILES!
230 :    
231 :     Entrypoints: non-zero offset into a code object where execution should begin.
232 :    
233 :     - Added the notion of an entrypoint to CodeObj.
234 :     - Added reading/writing of entrypoint info to Binfile.
235 :     - Made runtime system bootloader aware of entrypoints.
236 :     - Use the address of the label of the first function given to mlriscGen
237 :     as the entrypoint. This address is currently always 0, but it will
238 :     not be 0 once we turn on block placement.
239 :     - Removed the linkage cluster code (which was The Other Way(tm) of dealing
240 :     with entry points) from mlriscGen.
241 :    
242 :     ----------------------------------------------------------------------
243 : leunga 1127 Name: Allen Leung
244 :     Date: 2002/03/07 20:45:00 EST
245 :     Tag: leunga-20020307-x86-cmov
246 :     Description:
247 :    
248 :     Bug fixes for CMOVcc on x86.
249 :    
250 :     1. Added machine code generation for CMOVcc
251 :     2. CMOVcc is now generated in preference over SETcc on PentiumPro or above.
252 :     3. CMOVcc cannot have an immediate operand as argument.
253 :    
254 :     ----------------------------------------------------------------------
255 : blume 1126 Name: Matthias Blume
256 :     Date: 2002/03/07 16:15:00 EST
257 :     Tag: blume-20020307-controls
258 :     Description:
259 :    
260 :     This is a very large but mostly boring patch which makes (almost)
261 :     every tuneable compiler knob (i.e., pretty much everything under
262 :     Control.* plus a few other things) configurable via both the command
263 :     line and environment variables in the style CM did its configuration
264 :     until now.
265 :    
266 :     Try starting sml with '-h' (or, if you are brave, '-H')
267 :    
268 :     To this end, I added a structure Controls : CONTROLS to smlnj-lib.cm which
269 :     implements the underlying generic mechanism.
270 :    
271 :     The interface to some of the existing such facilities has changed somewhat.
272 :     For example, the MLRiscControl module now provides mkFoo instead of getFoo.
273 :     (The getFoo interface is still there for backward-compatibility, but its
274 :     use is deprecated.)
275 :    
276 :     The ml-build script passes -Cxxx=yyy command-line arguments through so
277 :     that one can now twiddle the compiler settings when using this "batch"
278 :     compiler.
279 :    
280 :     TODO items:
281 :    
282 :     We should go through and throw out all controls that are no longer
283 :     connected to anything. Moreover, we should go through and provide
284 :     meaningful (and correct!) documentation strings for those controls
285 :     that still are connected.
286 :    
287 :     Currently, multiple calls to Controls.new are accepted (only the first
288 :     has any effect). Eventually we should make sure that every control
289 :     is being made (via Controls.new) exactly once. Future access can then
290 :     be done using Controls.acc.
291 :    
292 :     Finally, it would probably be a good idea to use the getter-setter
293 :     interface to controls rather than ref cells. For the time being, both
294 :     styles are provided by the Controls module, but getter-setter pairs are
295 :     better if thread-safety is of any concern because they can be wrapped.
296 :    
297 :     *****************************************
298 :    
299 :     One bug fix: The function blockPlacement in three of the MLRISC
300 :     backpatch files used to be hard-wired to one of two possibilities at
301 :     link time (according to the value of the placementFlag). But (I
302 :     think) it should rather sense the flag every time.
303 :    
304 :     *****************************************
305 :    
306 :     Other assorted changes (by other people who did not supply a HISTORY entry):
307 :    
308 :     1. the cross-module inliner now works much better (Monnier)
309 :     2. representation of weights, frequencies, and probabilities in MLRISC
310 :     changed in preparation of using those for weighted block placement
311 :     (Reppy, George)
312 :    
313 :     ----------------------------------------------------------------------
314 : george 1116 Name: Lal George
315 : george 1124 Date: 2002/03/07 14:44:24 EST 2002
316 :     Tag: george-20020307-weighted-block-placement
317 :    
318 :     Tested the weighted block placement optimization on all architectures
319 :     (except the hppa) using AMPL to generate the block and edge frequencies.
320 :     Changes were required in the machine properties to correctly
321 :     categorize trap instructions. There is an MLRISC flag
322 :     "weighted-block-placement" that can be used to enable weighted block
323 :     placement, but this will be ineffective without block/edge
324 :     frequencies (coming soon).
325 :    
326 :    
327 :     ----------------------------------------------------------------------
328 :     Name: Lal George
329 : george 1116 Date: 2002/03/05 17:24:48 EST
330 :     Tag: george-20020305-linkage-cluster
331 :    
332 : george 1124 In order to support the block placement optimization, a new cluster
333 :     is generated as the very first cluster (called the linkage cluster).
334 :     It contains a single jump to the 'real' entry point for the compilation
335 :     unit. Block placement has no effect on the linkage cluster itself, but
336 :     all the other clusters have full freedom in the manner in which they
337 :     reorder blocks or functions.
338 : george 1116
339 :     On the x86 the typical linkage code that is generated is:
340 :     ----------------------
341 :     .align 2
342 :     L0:
343 :     addl $L1-L0, 72(%esp)
344 : george 1124 jmp L1
345 : george 1116
346 :    
347 :     .align 2
348 :     L1:
349 :     ----------------------
350 :    
351 :     72(%esp) is the memory location for the stdlink register. This
352 :     must contain the address of the CPS function being called. In the
353 : george 1124 above example, it contains the address of L0; before
354 : george 1116 calling L1 (the real entry point for the compilation unit), it
355 :     must contain the address for L1, and hence
356 :    
357 :     addl $L1-L0, 72(%esp)
358 :    
359 : george 1124 I have tested this on all architectures except the hppa.The increase
360 :     in code size is of course negligible
361 : george 1116
362 :     ----------------------------------------------------------------------
363 : leunga 1115 Name: Allen Leung
364 :     Date: 2002/03/03 13:20:00 EST
365 :     Tag: leunga-20020303-mlrisc-tools
366 :    
367 :     Added #[ ... ] expressions to mlrisc tools
368 :    
369 :     ----------------------------------------------------------------------
370 : blume 1096 Name: Matthias Blume
371 : blume 1098 Date: 2002/02/27 12:29:00 EST
372 :     Tag: blume-20020227-cdebug
373 :     Description:
374 :    
375 :     - made types in structure C and C_Debug to be equal
376 :     - got rid of code duplication (c-int.sml vs. c-int-debug.sml)
377 :     - there no longer is a C_Int_Debug (C_Debug is directly derived from C)
378 :    
379 :     ----------------------------------------------------------------------
380 :     Name: Matthias Blume
381 : blume 1096 Date: 2002/02/26 12:00:00 EST
382 :     Tag: blume-20020226-ffi
383 :     Description:
384 :    
385 :     1. Fixed a minor bug in CM's "noweb" tool:
386 :     If numbering is turned off, then truly don't number (i.e., do not
387 :     supply the -L option to noweb). The previous behavior was to supply
388 :     -L'' -- which caused noweb to use the "default" line numbering scheme.
389 :     Thanks to Chris Richards for pointing this out (and supplying the fix).
390 :    
391 :     2. Once again, I reworked some aspects of the FFI:
392 :    
393 :     A. The incomplete/complete type business:
394 :    
395 :     - Signatures POINTER_TO_INCOMPLETE_TYPE and accompanying functors are
396 :     gone!
397 :     - ML types representing an incomplete type are now *equal* to
398 :     ML types representing their corresponding complete types (just like
399 :     in C). This is still safe because ml-nlffigen will not generate
400 :     RTTI for incomplete types, nor will it generate functions that
401 :     require access to such RTTI. But when ML code generated from both
402 :     incomplete and complete versions of the C type meet, the ML types
403 :     are trivially interoperable.
404 :    
405 :     NOTE: These changes restore the full generality of the translation
406 :     (which was previously lost when I eliminated functorization)!
407 :    
408 :     B. Enum types:
409 :    
410 :     - Structure C now has a type constructor "enum" that is similar to
411 :     how the "su" constructor works. However, "enum" is not a phantom
412 :     type because each "T enum" has values (and is isomorphic to
413 :     MLRep.Signed.int).
414 :     - There are generic access operations for enum objects (using
415 :     MLRep.Signed.int).
416 :     - ml-nlffigen will generate a structure E_foo for each "enum foo".
417 :     * The structure contains the definition of type "mlrep" (the ML-side
418 :     representation type of the enum). Normally, mlrep is the same
419 :     as "MLRep.Signed.int", but if ml-nlffigen was invoked with "-ec",
420 :     then mlrep will be defined as a datatype -- thus facilitating
421 :     pattern matching on mlrep values.
422 :     ("-ec" will be suppressed if there are duplicate values in an
423 :     enumeration.)
424 :     * Constructors ("-ec") or values (no "-ec") e_xxx of type mlrep
425 :     will be generated for each C enum constant xxx.
426 :     * Conversion functions m2i and i2m convert between mlrep and
427 :     MLRep.Signed.int. (Without "-ec", these functions are identities.)
428 :     * Coversion functions c and ml convert between mlrep and "tag enum".
429 :     * Access functions (get/set) fetch and store mlrep values.
430 :     - By default (unless ml-nlffigen was invoked with "-nocollect"), unnamed
431 :     enumerations are merged into one single enumeration represented by
432 :     structure E_'.
433 :    
434 :     ----------------------------------------------------------------------
435 : leunga 1080 Name: Allen Leung
436 : leunga 1094 Date: 2002/02/25 04:45:00 EST
437 :     Tag: leunga-20020225-cps-spill
438 :    
439 :     This is a new implementation of the CPS spill phase.
440 :     The new phase is in the new file compiler/CodeGen/cpscompile/spill-new.sml
441 :     In case of problems, replace it with the old file spill.sml
442 :    
443 :     The current compiler runs into some serious performance problems when
444 :     constructing a large record. This can happen when we try to compile a
445 :     structure with many items. Even a very simple structure like the following
446 :     makes the compiler slow down.
447 :    
448 :     structure Foo = struct
449 :     val x_1 = 0w1 : Word32.int
450 :     val x_2 = 0w2 : Word32.int
451 :     val x_3 = 0w3 : Word32.int
452 :     ...
453 :     val x_N = 0wN : Word32.int
454 :     end
455 :    
456 :     The following table shows the compile time, from N=1000 to N=4000,
457 :     with the old compiler:
458 :    
459 :     N
460 :     1000 CPS 100 spill 0.04u 0.00s 0.00g
461 :     MLRISC ra 0.06u 0.00s 0.05g
462 :     (spills = 0 reloads = 0)
463 :     TOTAL 0.63u 0.07s 0.21g
464 :    
465 :     1100 CPS 100 spill 8.25u 0.32s 0.64g
466 :     MLRISC ra 5.68u 0.59s 3.93g
467 :     (spills = 0 reloads = 0)
468 :     TOTAL 14.71u 0.99s 4.81g
469 :    
470 :     1500 CPS 100 spill 58.55u 2.34s 1.74g
471 :     MLRISC ra 5.54u 0.65s 3.91g
472 :     (spills = 543 reloads = 1082)
473 :     TOTAL 65.40u 3.13s 6.00g
474 :    
475 :     2000 CPS 100 spill 126.69u 4.84s 3.08g
476 :     MLRISC ra 0.80u 0.10s 0.55g
477 :     (spills = 42 reloads = 84)
478 :     TOTAL 129.42u 5.10s 4.13g
479 :    
480 :     3000 CPS 100 spill 675.59u 19.03s 11.64g
481 :     MLRISC ra 2.69u 0.27s 1.38g
482 :     (spills = 62 reloads = 124)
483 :     TOTAL 682.48u 19.61s 13.99g
484 :    
485 :     4000 CPS 100 spill 2362.82u 56.28s 43.60g
486 :     MLRISC ra 4.96u 0.27s 2.72g
487 :     (spills = 85 reloads = 170)
488 :     TOTAL 2375.26u 57.21s 48.00g
489 :    
490 :     As you can see the old cps spill module suffers from some serious
491 : leunga 1115 performance problem. But since I cannot decipher the old code fully,
492 :     instead of patching the problems up, I'm reimplementing it
493 : leunga 1094 with a different algorithm. The new code is more modular,
494 :     smaller when compiled, and substantially faster
495 :     (O(n log n) time and O(n) space). Timing of the new spill module:
496 :    
497 :     4000 CPS 100 spill 0.02u 0.00s 0.00g
498 :     MLRISC ra 0.25u 0.02s 0.15g
499 :     (spills=1 reloads=3)
500 :     TOTAL 7.74u 0.34s 1.62g
501 :    
502 :     Implementation details:
503 :    
504 :     As far as I can tell, the purpose of the CPS spill module is to make sure the
505 :     number of live variables at any program point (the bandwidth)
506 :     does not exceed a certain limit, which is determined by the
507 :     size of the spill area.
508 :    
509 :     When the bandwidth is too large, we decrease the register pressure by
510 :     packing live variables into spill records. How we achieve this is
511 :     completely different than what we did in the old code.
512 :    
513 :     First, there is something about the MLRiscGen code generator
514 :     that we should be aware of:
515 :    
516 :     o MLRiscGen performs code motion!
517 :    
518 :     In particular, it will move floating point computations and
519 :     address computations involving only the heap pointer to
520 :     their use sites (if there is only a single use).
521 :     What this means is that if we have a CPS record construction
522 :     statement
523 :    
524 :     RECORD(k,vl,w,e)
525 :    
526 :     we should never count the new record address w as live if w
527 :     has only one use (which is often the case).
528 :    
529 :     We should do something similar to floating point, but the transformation
530 :     there is much more complex, so I won't deal with that.
531 :    
532 :     Secondly, there are now two new cps primops at our disposal:
533 :    
534 :     1. rawrecord of record_kind option
535 :     This pure operator allocates some uninitialized storage from the heap.
536 :     There are two forms:
537 :    
538 :     rawrecord NONE [INT n] allocates a tagless record of length n
539 :     rawrecord (SOME rk) [INT n] allocates a tagged record of length n
540 :     and initializes the tag.
541 :    
542 :     2. rawupdate of cty
543 :     rawupdate cty (v,i,x)
544 :     Assigns to x to the ith component of record v.
545 :     The storelist is not updated.
546 :    
547 :     We use these new primops for both spilling and increment record construction.
548 :    
549 :     1. Spilling.
550 :    
551 :     This is implemented with a linear scan algorithm (but generalized
552 :     to trees). The algorithm will create a single spill record at the
553 :     beginning of the cps function and use rawupdate to spill to it,
554 :     and SELECT or SELp to reload from it. So both spills and reloads
555 :     are fine-grain operations. In contrast, in the old algorithm
556 :     "spills" have to be bundled together in records.
557 :    
558 :     Ideally, we should sink the spill record construction to where
559 :     it is needed. We can even split the spill record into multiple ones
560 :     at the places where they are needed. But CPS is not a good
561 :     representation for global code motion, so I'll keep it simple and
562 :     am not attempting this.
563 :    
564 :     2. Incremental record construction (aka record splitting).
565 :    
566 :     Long records with many component values which are simulatenously live
567 :     (recall that single use record addresses are not considered to
568 :     be live) are constructed with rawrecord and rawupdate.
569 :     We allocate space on the heap with rawrecord first, then gradually
570 :     fill it in with rawupdate. This is the technique suggested to me
571 :     by Matthias.
572 :    
573 :     Some restrictions on when this is applicable:
574 :     1. It is not a VECTOR record. The code generator currently does not handle
575 :     this case. VECTOR record uses double indirection like arrays.
576 :     2. All the record component values are defined in the same "basic block"
577 :     as the record constructor. This is to prevent speculative
578 :     record construction.
579 :    
580 :     ----------------------------------------------------------------------
581 :     Name: Allen Leung
582 : leunga 1086 Date: 2002/02/22 01:02:00 EST
583 :     Tag: leunga-20020222-mlrisc-tools
584 :    
585 :     Minor bug fixes in the parser and rewriter
586 :    
587 :     ----------------------------------------------------------------------
588 :     Name: Allen Leung
589 : leunga 1085 Date: 2002/02/21 20:20:00 EST
590 :     Tag: leunga-20020221-peephole
591 :    
592 :     Regenerated the peephole files. Some contained typos in the specification
593 :     and some didn't compile because of pretty printing bugs in the old version
594 :     of 'nowhere'.
595 :    
596 :     ----------------------------------------------------------------------
597 :     Name: Allen Leung
598 : leunga 1079 Date: 2002/02/19 20:20:00 EST
599 :     Tag: leunga-20020219-mlrisc-tools
600 :     Description:
601 :    
602 :     Minor bug fixes to the mlrisc-tools library:
603 :    
604 :     1. Fixed up parsing colon suffixed keywords
605 :     2. Added the ability to shut the error messages up
606 :     3. Reimplemented the pretty printer and fixed up/improved
607 :     the pretty printing of handle and -> types.
608 :     4. Fixed up generation of literal symbols in the nowhere tool.
609 :     5. Added some SML keywords to to sml.sty
610 :    
611 :     ----------------------------------------------------------------------
612 :     Name: Matthias Blume
613 : blume 1078 Date: 2002/02/19 16:20:00 EST
614 :     Tag: blume-20020219-cmffi
615 :     Description:
616 :    
617 :     A wild mix of changes, some minor, some major:
618 :    
619 :     * All C FFI-related libraries are now anchored under $c:
620 :     $/c.cm --> $c/c.cm
621 :     $/c-int.cm --> $c/internals/c-int.cm
622 :     $/memory.cm --> $c/memory/memory.cm
623 :    
624 :     * "make" tool (in CM) now treats its argument pathname slightly
625 :     differently:
626 :     1. If the native expansion is an absolute name, then before invoking
627 :     the "make" command on it, CM will apply OS.Path.mkRelative
628 :     (with relativeTo = OS.FileSys.getDir()) to it.
629 :     2. The argument will be passed through to subsequent phases of CM
630 :     processing without "going native". In particular, if the argument
631 :     was an anchored path, then "make" will not lose track of that anchor.
632 :    
633 :     * Compiler backends now "know" their respective C calling conventions
634 :     instead of having to be told about it by ml-nlffigen. This relieves
635 :     ml-nlffigen from one of its burdens.
636 :    
637 :     * The X86Backend has been split into X86CCallBackend and X86StdCallBackend.
638 :    
639 :     * Export C_DEBUG and C_Debug from $c/c.cm.
640 :    
641 :     * C type encoding in ml-nlffi-lib has been improved to model the conceptual
642 :     subtyping relationship between incomplete pointers and their complete
643 :     counterparts. For this, ('t, 'c) ptr has been changed to 'o ptr --
644 :     with the convention of instantiating 'o with ('t, 'c) obj whenever
645 :     the pointer target type is complete. In the incomplete case, 'o
646 :     will be instantiated with some "'c iobj" -- a type obtained by
647 :     using one of the functors PointerToIncompleteType or PointerToCompleteType.
648 :    
649 :     Operations that work on both incomplete and complete pointer types are
650 :     typed as taking an 'o ptr while operations that require the target to
651 :     be known are typed as taking some ('t, 'c) obj ptr.
652 :    
653 :     voidptr is now a bit "more concrete", namely "type voidptr = void ptr'"
654 :     where void is an eqtype without any values. This makes it possible
655 :     to work on voidptr values using functions meant to operate on light
656 :     incomplete pointers.
657 :    
658 :     * As a result of the above, signature POINTER_TO_INCOMPLETE_TYPE has
659 :     been vastly simplified.
660 :    
661 :     ----------------------------------------------------------------------
662 :     Name: Matthias Blume
663 : blume 1076 Date: 2002/02/19 10:48:00 EST
664 :     Tag: blume-20020219-pqfix
665 :     Description:
666 :    
667 :     Applied Chris Okasaki's bug fix for priority queues.
668 :    
669 :     ----------------------------------------------------------------------
670 :     Name: Matthias Blume
671 : blume 1073 Date: 2002/02/15 17:05:00
672 : blume 1069 Tag: Release_110_39
673 :     Description:
674 :    
675 : blume 1073 Last-minute retagging is becoming a tradition... :-(
676 :    
677 :     This is the working release 110.39.
678 :    
679 :     ----------------------------------------------------------------------
680 :     Name: Matthias Blume
681 :     Date: 2002/02/15 16:00:00 EST
682 :     Tag: Release_110_39-orig
683 :     Description:
684 :    
685 : blume 1069 Working release 110.39. New bootfiles.
686 :    
687 : blume 1073 (Update: There was a small bug in the installer so it wouldn't work
688 :     with all shells. So I retagged. -Matthias)
689 :    
690 : blume 1069 ----------------------------------------------------------------------
691 :     Name: Matthias Blume
692 : blume 1068 Date: 2002/02/15 14:17:00 EST
693 :     Tag: blume-20020215-showbindings
694 :     Description:
695 :    
696 :     Added EnvRef.listBoundSymbols and CM.State.showBindings. Especially
697 :     the latter can be useful for exploring what bindings are available at
698 :     the interactive prompt. (The first function returns only the list
699 :     of symbols that are really bound, the second prints those but also the
700 :     ones that CM's autoloading mechanism knows about.)
701 :    
702 :     ----------------------------------------------------------------------
703 :     Name: Matthias Blume
704 : blume 1067 Date: 2002/02/15 12:08:00 EST
705 :     Tag: blume-20020215-iptrs
706 :     Description:
707 :    
708 :     Two improvements to ml-nlffigen:
709 :    
710 :     1. Write files only if they do not exist or if their current contents
711 :     do not coincide with what's being written. (That is, avoid messing
712 :     with the time stamps unless absolutely necessary.)
713 :    
714 :     2. Implement a "repository" mechanism for generated files related
715 :     to "incomplete pointer types". See the README file for details.
716 :    
717 :     ----------------------------------------------------------------------
718 :     Name: Matthias Blume
719 : blume 1066 Date: 2002/02/14 11:50:00 EST
720 :     Tag: blume-20020214-quote
721 :     Description:
722 :    
723 :     Added a type 't t_' to tag.sml (in ml-nlffi-lib.cm). This is required
724 :     because of the new and improved tag generation scheme. (Thanks to Allen
725 :     Leung for pointing it out.)
726 :    
727 :     ----------------------------------------------------------------------
728 : george 1065 Name: Lal George
729 :     Date: 2002/02/14 09:55:27 EST 2002
730 :     Tag: george-20020214-isabelle-bug
731 :     Description:
732 :    
733 :     Fixed the MLRISC bug sent by Markus Wenzel regarding the compilation
734 :     of Isabelle on the x86.
735 :    
736 :     From Allen:
737 :     -----------
738 :     I've found the problem:
739 :    
740 :     in ra-core.sml, I use the counter "blocked" to keep track of the
741 :     true number of elements in the freeze queue. When the counter goes
742 :     to zero, I skip examining the queue. But I've messed up the
743 :     bookkeeping in combine():
744 :    
745 :     else ();
746 :     case !ucol of
747 :     PSEUDO => (if !cntv > 0 then
748 :     (if !cntu > 0 then blocked := !blocked - 1 else ();
749 :     ^^^^^^^^^^^^^^^^^^^^^^^
750 :     moveu := mergeMoveList(!movev, !moveu)
751 :     )
752 :     else ();
753 :    
754 :     combine() is called to coalesce two nodes u and v.
755 :     I think I was thinking that if the move counts of u and v are both
756 :     greater than zero then after they are coalesced then one node is
757 :     removed from the freeze queue. Apparently I was thinking that
758 :     both u and v are of low degree, but that's clearly not necessarily true.
759 :    
760 :    
761 :     02/12/2002:
762 :     Here's the patch. HOL now compiles.
763 :    
764 :     I don't know how this impact on performance (compile
765 :     time or runtime). This bug caused the RA (especially on the x86)
766 :     to go thru the potential spill phase when there are still nodes on the
767 :     freeze queue.
768 :    
769 :    
770 :    
771 :    
772 :     ----------------------------------------------------------------------
773 : blume 1058 Name: Matthias Blume
774 : blume 1064 Date: 2002/02/13 22:40:00 EST
775 :     Tag: blume-20020213-fptr-rtti
776 :     Description:
777 :    
778 :     Fixed a bug in ml-nlffigen that was introduced with one of the previous
779 :     updates.
780 :    
781 :     ----------------------------------------------------------------------
782 :     Name: Matthias Blume
783 : blume 1063 Date: 2002/02/13 16:41:00 EST
784 :     Tag: blume-20020213-cmlpq
785 :     Description:
786 :    
787 :     Added new priority queue export symbols (which have just been added to
788 :     smlnj-lib.cm) to CML's version of smlnj-lib.cm. (Otherwise CML would
789 :     not compile and the installer would choke.)
790 :    
791 :     ----------------------------------------------------------------------
792 :     Name: Matthias Blume
793 : blume 1062 Date: 2002/02/13 16:15:00 EST
794 :     Tag: blume-20020213-various
795 :     Description:
796 :    
797 :     1. More tweaks to ml-nlffigen:
798 :    
799 :     - better internal datastructures (resulting in slight speedup)
800 :     - "-match" option requires exact match
801 :     - "localized" gensym counters (untagged structs/unions nested within
802 :     other structs/unions or within typedefs get a fresh counter; their
803 :     tag will be prefixed by a concatenation of their parents' tags)
804 :     - bug fixes (related to calculation of transitive closure of types
805 :     to be included in the output)
806 :    
807 :     2. Minor Basis updates:
808 :    
809 :     - added implementations for List.collate and Option.app
810 :    
811 :     ----------------------------------------------------------------------
812 :     Name: Matthias Blume
813 : blume 1060 Date: 2002/02/11 15:55:00 EST
814 :     Tag: blume-20020211-gensym
815 :     Description:
816 :    
817 :     Added a "-gensym" option to command line of ml-nlffigen. This can be
818 :     used to specify a "stem" -- a string that is inserted in all "gensym'd"
819 :     names (ML structure names that correspond to unnamed C structs, unions,
820 :     and enums), so that separate runs of ml-nlffigen do not clash.
821 :    
822 :     ----------------------------------------------------------------------
823 :     Name: Matthias Blume
824 : blume 1059 Date: 2002/02/11 12:05:00 EST
825 :     Tag: blume-20020211-gensml
826 :     Description:
827 :    
828 :     A quick fix for a problem with GenSML (in the pgraph-util library):
829 :     Make generation of toplevel "local" optional. (Strictly speaking,
830 :     signature definitions within "local" are not legal SML.)
831 :    
832 :     Other than that: updates to INSTALL and cm/TODO.
833 :    
834 :     ----------------------------------------------------------------------
835 :     Name: Matthias Blume
836 : blume 1058 Date: 2002/02/08 15:00:00 EST
837 :     Tag: blume-20020208-uniquepid
838 :     Description:
839 :    
840 :     0. Version number has been bumped to 110.38.1. NEW BOOTFILES!!!
841 :    
842 :     1. The installer (config/install.sh) has gotten smarter:
843 :    
844 :     - Configuration options are a bit easier to specify now
845 :     (in config/targets).
846 :     - Bug in recognizing .tar.bz2 files fixed.
847 :     - Installer automatically resolves dependencies between
848 :     configuration options (e.g., if you ask for eXene, you will
849 :     also get cml -- regardless whether you asked for it or not).
850 :     - Installer can run in "quieter mode" by setting the environment
851 :     variable INSTALL_QUIETLY to "true". "Quieter" does not mean
852 :     "completely silent", though.
853 :     - Build HashCons library as part of smlnj-lib.
854 :    
855 :     2. A new scheme for assigning persistent identifiers to compilation
856 :     units (and, by extension, to types etc.) has been put into place.
857 :     This fixes a long-standing bug where types and even dynamic values
858 :     can get internally confused, thereby compromising type safety
859 :     (abstraction) and dynamic correctness. See
860 :    
861 :     http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
862 :    
863 :     for an example of how things could go wrong until now.
864 :    
865 :     The downside of the new scheme is that pids are not quite as
866 :     persistent as they used to be: CM will generate a fresh pid
867 :     for every compilation unit that it thinks it sees for the first
868 :     time. That means that if you compile starting from a clean, fresh
869 :     source tree at two different times, you end up with different
870 :     binaries.
871 :    
872 :     Cutoff recompilation, however, has not been compromised because
873 :     CM keeps pid information in special caches between runs.
874 :    
875 :     ----------------------------------------------------------------------
876 : george 1053 Name: Lal George
877 : george 1055 Date: 2002/02/07 15:34:13 EST 2002
878 :     Tag: <none>
879 :     Description:
880 :    
881 :     Compilers that generate assembly code may produce global labels
882 :     whose value is resolved at link time. The various peephole optimization
883 :     modules did not take this in account.
884 :    
885 :     TODO. The Labels.addrOf function should really return an option
886 :     type so that clients are forced to deal with this issue, rather
887 :     than an exception being raised.
888 :    
889 :     ----------------------------------------------------------------------
890 :     Name: Lal George
891 : george 1053 Date: 2002/02/06 13:55:02 EST
892 :     Tag: george-20020206-ra-breakup
893 :     Description:
894 :    
895 :     1. A bug fix from Allen.
896 :    
897 :     A typo causes extra fstp %st(0)'s to be generated at compensation
898 :     edges, which might cause stack underflow traps at runtime. This
899 :     occurs in fft where there are extraneous fstps right before the 'into'
900 :     trap instruction (in this case they are harmless since none of the
901 :     integers overflow.)
902 :    
903 : george 1054 2. Pulled out various utility modules that were embedded in the modules
904 : george 1053 of the register allocator. I need these modules for other purposes, but
905 : george 1054 they are not complete enough to put into a library (just yet).
906 : george 1053 ----------------------------------------------------------------------
907 : blume 1049 Name: Matthias Blume
908 :     Date: 2002/01/31 16:05:00 EST
909 :     Tag: blume-20020131-sparc-ccalls
910 :     Description:
911 :    
912 :     1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
913 :     of extra stack space by mistake. Fixed.
914 :    
915 :     2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
916 :    
917 :     ----------------------------------------------------------------------
918 : leunga 1048 Name: Allen Leung
919 :     Date: 2002/01/30
920 :     Tag: leunga-20020130-nowhere-bug-fix
921 :     Description:
922 :    
923 :     MLRISC bug fixes:
924 :     1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
925 :     2. MachineInt.fromString was negating its value.
926 :    
927 :     ----------------------------------------------------------------------
928 : blume 1039 Name: Matthias Blume
929 : blume 1047 Date: 2002/01/29
930 :     Tag: blume-20020129-INSTALL
931 :     Description:
932 :    
933 :     - Added somewhat detailed installation instructions (file INSTALL).
934 :     - Fixed curl-detection bug in config/install.sh.
935 :     - It is now possible to select the URL getter using the URLGETTER
936 :     environment variable:
937 :    
938 :     not set / "unknown" --> automatic detection (script tries wget,
939 :     curl, and lynx)
940 :     "wget" / "curl" / "lynx" --> use the specified program (script "knows"
941 :     how to properly invoke them)
942 :     other --> use $URLGETTER directly, it must take
943 :     precisely two command-line arguments
944 :     (source URL and destination file name)
945 :    
946 :     ----------------------------------------------------------------------
947 :     Name: Matthias Blume
948 : blume 1044 Date: 2002/01/28
949 : blume 1045 Tag: blume-20020128-sparc-ccalls
950 :     Description:
951 :    
952 :     - Fixed problem with calculation of "used" registers in sparc-c-calls.
953 :     - Make use of the allocParam argument in sparc-c-calls.
954 :    
955 :     ----------------------------------------------------------------------
956 :     Name: Matthias Blume
957 :     Date: 2002/01/28
958 : blume 1044 Tag: blume-20020128-allocParam
959 :     Description:
960 :    
961 :     John Reppy: Changes c-calls API to accept client-callback for
962 :     allocating extra stack space.
963 :     me: Corresponding changes to mlriscGen (using a dummy argument that
964 :     does not change the current behavior).
965 :    
966 :     ----------------------------------------------------------------------
967 :     Name: Matthias Blume
968 : blume 1040 Date: 2002/01/28 12:00:00
969 :     Tag: Release_110_38
970 :     Description:
971 :    
972 :     This time for real!!!
973 :    
974 :     ----------------------------------------------------------------------
975 :     Name: Matthias Blume
976 : blume 1039 Date: 2002/01/28 10:56:00 EST
977 :     Tag: blume-20020128-retraction
978 :     Description:
979 :    
980 :     0. Retracted earlier 110.38. (The Release_110_38 tag has been replaced
981 :     with blume-Release_110_38-retracted.)
982 :    
983 :     1. Fixed a problem with incorrect rounding modes in real64.sml.
984 :     (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
985 :    
986 :     2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
987 :     and enums fixed. The naming of corresponding ML identifiers should
988 :     now be consistent again.
989 :    
990 :     ----------------------------------------------------------------------
991 : leunga 1038 Name: Allen Leung
992 :     Date: 2002/01/27
993 :     Tag: leunga-20020127-nowhere
994 :     Description:
995 :    
996 :     Added a target called nowhere in the configuration scripts.
997 :     Enabling this will build the MLRISC 'nowhere' tool (for translating
998 :     programs with where-clauses into legal SML code) during installation.
999 :    
1000 :     ----------------------------------------------------------------------
1001 : blume 1036 Name: Matthias Blume
1002 : leunga 1038 Date: 2002/01/25 21:27:00 EST
1003 : blume 1039 Tag: blume-Release_110_38-retracted
1004 : blume 1037 Description:
1005 :    
1006 :     Call it a (working) release! Version is 110.38. Bootfiles are ready.
1007 :    
1008 :     README will be added later.
1009 :    
1010 : blume 1039 !!! NOTE: Re-tagged as blume-Release_110_38-retracted. Original tag
1011 :     (Release_110_38) removed. Reason: Last-minute bug fixes.
1012 :    
1013 : blume 1037 ----------------------------------------------------------------------
1014 :     Name: Matthias Blume
1015 : blume 1036 Date: 2002/01/25
1016 :     Tag: blume-20020125-ffi
1017 :     Description:
1018 :    
1019 :     A large number of tweaks and improvements to ml-nlffi-lib and
1020 :     ml-nlffigen:
1021 :    
1022 :     - ML represenation types have been streamlined
1023 :     - getter and setter functions work with concrete values, not abstract
1024 :     ones where possible
1025 :     - ml-nlffigen command line more flexible (see README file there)
1026 :     - some bugs have been fixed (hopefully)
1027 :    
1028 :     ----------------------------------------------------------------------
1029 : george 1034 Name: Lal George
1030 :     Date: 2002/01/24
1031 :     Tag: george-20020124-risc-ra-interface
1032 :     Description:
1033 :    
1034 :     There is a dramatic simplification in the interface to the
1035 :     register allocator for RISC architectures as a result of making
1036 :     parallel copy instructions explicit.
1037 :    
1038 :     ----------------------------------------------------------------------
1039 : blume 1028 Name: Matthias Blume
1040 : blume 1032 Date: 2002/01/22
1041 :     Tag: blume-20020122-x86-ccalls
1042 :     Description:
1043 :    
1044 :     Bug fix for c-calls on x86 (having to do with how char- and
1045 :     short-arguments are being handled).
1046 :    
1047 :     ----------------------------------------------------------------------
1048 :     Name: Matthias Blume
1049 : blume 1031 Date: 2002/01/21
1050 :     Tag: blume-20020121-ff
1051 :     Description:
1052 :    
1053 :     Another day of fiddling with the FFI...
1054 :    
1055 :     1. Bug fix/workaround: CKIT does not complain about negative array
1056 :     dimensions, so ml-nlffigen has to guard itself against this possibility.
1057 :     (Otherwise a negative dimension would send it into an infinite loop.)
1058 :    
1059 :     2. Some of the abstract types (light objects, light pointers, most "base"
1060 :     types) in structure C are now eqtypes.
1061 :    
1062 :     3. Added constructors and test functions for NULL function pointers.
1063 :    
1064 :     ----------------------------------------------------------------------
1065 :     Name: Matthias Blume
1066 : blume 1028 Date: 2002/01/18
1067 : blume 1030 Tag: blume-20020118-ready-for-new-release
1068 :     Description:
1069 :    
1070 :     Made config/srcarchiveurl point to a new place. (Will provide boot
1071 :     files shortly.)
1072 :    
1073 :     Maybe we christen this to be 110.38?
1074 :    
1075 :     ----------------------------------------------------------------------
1076 :     Name: Matthias Blume
1077 :     Date: 2002/01/18
1078 : blume 1029 Tag: blume-20020118-more-ffifiddle
1079 :     Description:
1080 :    
1081 :     Today's FFI fiddling:
1082 :    
1083 :     - Provided a structure CGetSet with "convenient" versions of C.Get.* and
1084 :     C.Set.* that use concrete (MLRep.*) arguments and results instead
1085 :     of abstract ones.
1086 :    
1087 :     - Provided word-style bit operations etc. for "int" representation
1088 :     types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
1089 :     and Long.
1090 :    
1091 :     ----------------------------------------------------------------------
1092 :     Name: Matthias Blume
1093 :     Date: 2002/01/18
1094 : blume 1028 Tag: blume-20020118-use-x86-fp
1095 :     Description:
1096 :    
1097 :     Now that x86-fast-fp seems to be working, I turned it back on again
1098 :     by default. (Seems to work fine now, even with the FFI.)
1099 :    
1100 :     Other than that, I added some documentation about the FFI to
1101 :     src/ml-nlffigen/README and updated the FFI test examples in
1102 :     src/ml-nlffi-lib/Tests/*.
1103 :    
1104 :     ----------------------------------------------------------------------
1105 : leunga 1025 Name: Allen Leung
1106 :     Date: 2002/01/17
1107 :     Tag: leunga-20020117-x86-fast-fp-call
1108 :     Description:
1109 :    
1110 :     1. Fixed a problem with handling return fp values when x86's fast fp
1111 :     mode is turned on.
1112 :    
1113 :     2. Minor pretty printing fix for cellset. Print %st(0) as %st(0) instead
1114 :     of %f32.
1115 :    
1116 :     3. Added a constructor INT32lit to the ast of MLRISC tools.
1117 :    
1118 :     ----------------------------------------------------------------------
1119 : blume 1021 Name: Matthias Blume
1120 :     Date: 2002/01/16
1121 :     Tag: blume-20020116-ffifiddle
1122 :     Description:
1123 :    
1124 :     More fiddling with the FFI interface:
1125 :    
1126 :     - Make constness 'c instead of rw wherever possible. This eliminates
1127 :     the need for certain explicit coercions. (However, due to ML's
1128 :     value polymorphism, there will still be many cases where explicit
1129 :     coercions are necessary. Phantom types are not the whole answer
1130 :     to modeling a subtyping relationship in ML.)
1131 :    
1132 :     - ro/rw coersions for pointers added. (Avoids the detour through */&.)
1133 :    
1134 :     - "printf" test example added to src/ml-nlffi-lib/Tests. (Demonstrates
1135 :     clumsy workaround for varargs problem.)
1136 :    
1137 :     ----------------------------------------------------------------------
1138 : george 1016 Name: Lal George
1139 :     Date: 2002/01/15
1140 :     Tag: <none>
1141 :     Description:
1142 :    
1143 :     1. Since COPY instructions are no longer native to the architecture,
1144 :     a generic functor can be used to implement the expandCopies function.
1145 :    
1146 :     2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
1147 :     TEXT segment.
1148 :    
1149 :     ----------------------------------------------------------------------
1150 : blume 1011 Name: Matthias Blume
1151 : blume 1015 Date: 2002/01/15
1152 :     Tag: blume-20020115-ffiupdates
1153 :     Description:
1154 :    
1155 :     1. Fix for bug resulting in single-precision float values being returned
1156 :     incorrectly from FFI calls.
1157 :    
1158 :     2. Small modifications to C FFI API:
1159 :    
1160 :     - memory-allocation routines return straight objects (no options)
1161 :     and raise an exception in out-of-memory situations
1162 :     - unsafe extensions to cast between function pointers and pointers
1163 :     from/to ints
1164 :     - added structure C_Debug as an alternative to structure C where
1165 :     pointer-dereferencing (|*| and |*!) always check for null-pointers
1166 :     - added open_lib' to DynLinkage; open_lib' works like open_lib
1167 :     but also takes a (possibly empty) list of existing library handles
1168 :     that the current library depends on
1169 :    
1170 :     ----------------------------------------------------------------------
1171 :     Name: Matthias Blume
1172 : blume 1011 Date: 2002/01/10
1173 :     Tag: blume-20020110-newffigen
1174 :     Description:
1175 :    
1176 :     1. Updates to portable graph code.
1177 :    
1178 :     2. Major update to ml-nlffigen and ml-nlffi-lib. Things are much
1179 :     more scalable now so that even huge interfaces such as the one
1180 :     for GTK compile in finite time and space. :-)
1181 :     See src/ml-nlffigen/README for details on what's new.
1182 :    
1183 :     ----------------------------------------------------------------------
1184 : george 1003 Name: Lal George
1185 : george 1009 Date: 2001/01/09 14:31:35 EST 2002
1186 :     Tag: george-20011206-rm-native-copy
1187 :     Description:
1188 :    
1189 :     Removed the native COPY and FCOPY instructions
1190 :     from all the architectures and replaced it with the
1191 :     explicit COPY instruction from the previous commit.
1192 :    
1193 :     It is now possible to simplify many of the optimizations
1194 :     modules that manipulate copies. This has not been
1195 :     done in this change.
1196 :    
1197 :     ----------------------------------------------------------------------
1198 :     Name: Lal George
1199 : george 1003 Date: 2001/12/06 16:50:13 EST 2001
1200 :     Tag: george-20011206-mlrisc-instruction
1201 :     Description:
1202 : george 824
1203 : george 1003 Changed the representation of instructions from being fully abstract
1204 :     to being partially concrete. That is to say:
1205 :    
1206 :     from
1207 :     type instruction
1208 :    
1209 :     to
1210 :     type instr (* machine instruction *)
1211 :    
1212 :     datatype instruction =
1213 :     LIVE of {regs: C.cellset, spilled: C.cellset}
1214 :     | KILL of {regs: C.cellset, spilled: C.cellset}
1215 :     | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
1216 :     | ANNOTATION of {i: instruction, a: Annotations.annotation}
1217 :     | INSTR of instr
1218 :    
1219 :     This makes the handling of certain special instructions that appear on
1220 :     all architectures easier and uniform.
1221 :    
1222 :     LIVE and KILL say that a list of registers are live or killed at the
1223 :     program point where they appear. No spill code is generated when an
1224 :     element of the 'regs' field is spilled, but the register is moved to
1225 :     the 'spilled' (which is present, more for debugging than anything else).
1226 :    
1227 :     LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
1228 :     We used to generate:
1229 :    
1230 :     DEFFREG f1
1231 :     f1 := f2 + f3
1232 :     trapb
1233 :    
1234 :     but now generate:
1235 :    
1236 :     f1 := f2 + f3
1237 :     trapb
1238 :     LIVE {regs=[f1,f2,f3], spilled=[]}
1239 :    
1240 :     Furthermore, the DEFFREG (hack) required that all floating point instruction
1241 :     use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
1242 :     defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
1243 :     in a cleaner alpha implementation. (Hopefully, intel will not get rid of
1244 :     this architecture).
1245 :    
1246 :     COPYXXX is intended to replace the parallel COPY and FCOPY available on
1247 :     all the architectures. This will result in further simplification of the
1248 :     register allocator that must be aware of them for coalescing purposes, and
1249 :     will also simplify certain aspects of the machine description that provides
1250 :     callbacks related to parallel copies.
1251 :    
1252 :     ANNOTATION should be obvious, and now INSTR represents the honest to God
1253 :     machine instruction set!
1254 :    
1255 :     The <arch>/instructions/<arch>Instr.sml files define certain utility
1256 :     functions for making porting easier -- essentially converting upper case
1257 :     to lower case. All machine instructions (of type instr) are in upper case,
1258 :     and the lower case form generates an MLRISC instruction. For example on
1259 :     the alpha we have:
1260 :    
1261 :     datatype instr =
1262 :     LDA of {r:cell, b:cell, d:operand}
1263 :     | ...
1264 :    
1265 :     val lda : {r:cell, b:cell, d:operand} -> instruction
1266 :     ...
1267 :    
1268 :     where lda is just (INSTR o LDA), etc.
1269 :    
1270 : leunga 815 ----------------------------------------------------------------------
1271 : blume 986 Name: Matthias Blume
1272 : blume 993 Date: 2001/11/22 21:40:00 EST
1273 :     Tag: Release_110_37
1274 :     Description:
1275 :    
1276 :     Release 110.37. This time for real.
1277 :    
1278 :     ----------------------------------------------------------------------
1279 :     Name: Matthias Blume
1280 : blume 988 Date: 2001/11/21 16:35:00 EST
1281 :     Tag: blume-20011121-foot-in-mouth
1282 :     Description:
1283 :    
1284 :     Removed the "Release_110_37" tag because of a serious bug.
1285 :     This will be re-tagged once the bug is fixed.
1286 :    
1287 :     ----------------------------------------------------------------------
1288 :     Name: Matthias Blume
1289 : blume 987 Date: 2001/11/21 16:14:00 EST
1290 :     Tag: blume-20011121-forgottenfile
1291 :     Description:
1292 :    
1293 :     Forgot to add a file. (Just a .tex-file -- part of
1294 :     the CM manual source.)
1295 :    
1296 :     ----------------------------------------------------------------------
1297 :     Name: Matthias Blume
1298 : blume 986 Date: 2001/11/21 16:10:00 EST
1299 : blume 988 Tag: blume-20011121-invalid_110_37
1300 : blume 986 Description:
1301 :    
1302 : blume 988 Note: I removed the original tag "Release_110_37" from this commit
1303 :     because we found a serious bug in all non-x86 backends.
1304 :     - Matthias
1305 :    
1306 : blume 986 1. Modifications to the SML/NJ code generator and to the runtime system
1307 :     so that code object name strings are directly inserted into code
1308 :     objects at code generation time. The only business the runtime system
1309 :     has with this is now to read the name strings on occasions.
1310 :     (The encoding of the name string has also changed somewhat.)
1311 :    
1312 :     2. CM now implements a simple "set calculus" for specifying export lists.
1313 :     In particular, it is now possible to refer to the export lists of
1314 :     other libraries/groups/sources and form unions as well as differences.
1315 :     See the latest CM manual for details.
1316 :    
1317 :     3. An separate notion of "proxy" libraries has again be eliminated from
1318 :     CM's model. (Proxy libraries are now simply a special case of using
1319 :     the export list calculus.)
1320 :    
1321 :     4. Some of the existing libraries now take advantage of the new set
1322 :     calculus.
1323 :     (Notice that not all libraries have been converted because some
1324 :     of the existing .cm-files are supposed to be backward compatible
1325 :     with 110.0.x.)
1326 :    
1327 :     5. Some cleanup in stand-alone programs. (Don't use "exnMessage" -- use
1328 :     "General.exnMessage"! The former relies on a certain hook to be
1329 :     initialized, and that often does not happen in the stand-alone case.)
1330 :    
1331 :     ----------------------------------------------------------------------
1332 : george 984 Name: Lal George
1333 :     Date: 2001/11/21 13:56:18 EST
1334 :     Tag: george-2001121-pseudo-ops
1335 :     Description:
1336 :    
1337 :     Implemented a complete redesign of MLRISC pseudo-ops. Now there
1338 :     ought to never be any question of incompatabilities with
1339 :     pseudo-op syntax expected by host assemblers.
1340 :    
1341 :     For now, only modules supporting GAS syntax are implemented
1342 :     but more should follow, such as MASM, and vendor assembler
1343 :     syntax, e.g. IBM as, Sun as, etc.
1344 :    
1345 :     ----------------------------------------------------------------------
1346 : blume 977 Name: Matthias Blume
1347 :     Date: 2001/11/14 11:52:00 EST
1348 :     Tag: blume-20011114-srcname
1349 :     Description:
1350 :    
1351 :     1. Routed the name of the current source file to mlriscgen where it
1352 :     should be directly emitted into the code object. (This last part
1353 :     is yet to be done.)
1354 :    
1355 :     2. Some cleanup of the pgraph code to make it match the proposal that
1356 :     I put out the other day. (The proposal notwithstanding, things are
1357 :     still in flux here.)
1358 :    
1359 :     ----------------------------------------------------------------------
1360 : george 976 Name: Lal George
1361 :     Date: 2001/11/14 09:44:04 EST
1362 :     Tag:
1363 :     Description:
1364 :    
1365 :     Fix for a backpatching bug reported by Allen.
1366 :    
1367 :     Because the boundary between short and long span-dependent
1368 :     instructions is +/- 128, there are an astounding number of
1369 :     span-dependent instructions whose size is over estimated.
1370 :    
1371 :     Allen came up with the idea of letting the size of span
1372 :     dependent instructions be non-monotonic, for a maxIter
1373 :     number of times, after which the size must be monotonically
1374 :     increasing.
1375 :    
1376 :     This table shows the number of span-dependent instructions
1377 :     whose size was over-estimated as a function of maxIter, for the
1378 :     file Parse/parse/ml.grm.sml:
1379 :    
1380 :     maxIter # of instructions:
1381 :     10 687
1382 :     20 438
1383 :     30 198
1384 :     40 0
1385 :    
1386 :     In compiling the compiler, there is no significant difference in
1387 :     compilation speed between maxIter=10 and maxIter=40. Actually,
1388 :     my measurements showed that maxIter=40 was a tad faster than
1389 :     maxIter=10! Also 96% of the files in the compiler reach a fix
1390 :     point within 13 iterations, so fixing maxIter at 40, while high,
1391 :     is okay.
1392 :    
1393 :     ----------------------------------------------------------------------
1394 : blume 975 Name: Matthias Blume
1395 :     Date: 2001/10/31 15:25:00 EST
1396 :     Tag: blume-20011031-pgraph
1397 :     Description:
1398 :    
1399 :     CKIT:
1400 :     * Changed the "Function" constructor of type Ast.ctype to carry optional
1401 :     argument identifiers.
1402 :     * Changed the return type of TypeUtil.getFunction accordingly.
1403 :     * Type equality ignores the argument names.
1404 :     * TypeUtil.composite tries to preserve argument names but gives up quickly
1405 :     if there is a mismatch.
1406 :    
1407 :     installation script:
1408 :     * attempts to use "curl" if available (unless "wget" is available as well)
1409 :    
1410 :     CM:
1411 :     * has an experimental implementation of "portable graphs" which I will
1412 :     soon propose as an implementation-independent library format
1413 :     * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
1414 :    
1415 :     NLFFI-LIB:
1416 :     * some cleanup (all cosmetic)
1417 :    
1418 :     NLFFIGEN:
1419 :     * temporarily disabled the mechanism that suppresses ML output for
1420 :     C definitions whose identifiers start with an underscore character
1421 :     * generate val bindings for enum constants
1422 :     * user can request that only one style (light or heavy) is being used;
1423 :     default is to use both (command-line arguments: -heavy and -light)
1424 :     * fixed bug in handling of function types involving incomplete pointers
1425 :     * generate ML entry points that take record arguments (i.e., using
1426 :     named arguments) for C functions that have a prototype with named
1427 :     arguments
1428 :     (see changes to CKIT)
1429 :    
1430 :     ----------------------------------------------------------------------
1431 : leunga 972 Name: Allen Leung
1432 :     Date: 2001/10/27 20:34:00 EDT
1433 :     Tag: leunga-20011027-x86-fast-fp-call
1434 :     Description:
1435 :    
1436 :     Fixed the bug described in blume-20010920-slowfp.
1437 :    
1438 :     The fix involves
1439 :     1. generating FCOPYs in FSTP in ia32-svid
1440 :     2. marking a CALL with the appropriate annotation
1441 :    
1442 :     ----------------------------------------------------------------------
1443 : blume 961 Name: Matthias Blume
1444 :     Date: 2001/10/16 11:32:00 EDT
1445 :     Tag: blume-20011016-netbsd
1446 :     Description:
1447 :    
1448 :     Underscore patch from Chris Richards (fixing problem with compiling
1449 :     runtime system under recent NetBSD).
1450 :    
1451 :     ----------------------------------------------------------------------
1452 : george 959 Name: Allen Leung
1453 :     Date: 2001/10/12 17:18:32 EDT 2001
1454 :     Tag: leung-20011012-x86-printflowgraph
1455 :     Description:
1456 :    
1457 :     X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
1458 :    
1459 :     ----------------------------------------------------------------------
1460 : george 952 Name: Lal George
1461 : george 958 Date: 2001/10/11 23:51:34 EDT
1462 :     Tag: george-20011011-too-many-instrs
1463 :     Description:
1464 :    
1465 :     The representation of a program point never expected to see more
1466 :     than 65536 instructions in a basic block!
1467 :    
1468 :     ----------------------------------------------------------------------
1469 :     Name: Lal George
1470 : george 952 Date: 2001/10/09 09:41:37 EDT
1471 :     Tag: george-20011008-mlrisc-labels
1472 :     Description:
1473 :    
1474 :     Changed the machine description files to support printing of
1475 :     local and global labels in assembly code, based on host assembler
1476 :     conventions.
1477 :    
1478 :     ----------------------------------------------------------------------
1479 : blume 916 Name: Matthias Blume
1480 : blume 939 Date: 2001/09/25 15:25:00 EDT
1481 :     Tag: blume-20010925-exninfo
1482 :     Description:
1483 :    
1484 :     I provided a non-hook implementation of exnName (at the toplevel) and
1485 :     made the "dummy" implementation of exnMessage (at the toplevel) more
1486 :     useful: if nothing gets "hooked in", then at least you are going to
1487 :     see the exception name and a message indicating why you don't see more.
1488 :    
1489 :     [For the time being, programs that need exnMessage and want to use
1490 :     ml-build should either use General.exnMessage (strongly recommended) or
1491 :     refer to structure General at some other point so that CM sees a
1492 :     static dependency.]
1493 :    
1494 :     [Similar remarks go for "print" and "use": If you want to use their
1495 :     functionality in stand-alone programs generated by ml-build, then use
1496 :     TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
1497 :    
1498 :     ----------------------------------------------------------------------
1499 :     Name: Matthias Blume
1500 : blume 938 Date: 2001/09/20 17:28:00 EDT
1501 :     Tag: blume-20010920-slowfp
1502 :     Description:
1503 :    
1504 :     Allen says that x86-fast-fp is not safe yet, so I turned it off again...
1505 :    
1506 :     ----------------------------------------------------------------------
1507 :     Name: Matthias Blume
1508 : blume 937 Date: 2001/09/20 17:20:00 EDT
1509 :     Tag: blume-20010920-canonicalpaths
1510 :     Description:
1511 :    
1512 :     0. Updated the BOOT file (something that I forgot to do earlier).
1513 :    
1514 :     1. Small internal change to CM so that it avoids "/../" in filenames
1515 :     as much as possible (but only where it is safe).
1516 :    
1517 :     2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
1518 :     that arguments that contain delimiters are passed through correctly.
1519 :     This change also means that all "special" arguments of the form
1520 :     @SMLxxx... must come first.
1521 :    
1522 :     3. Changed install script to put relative anchor names for tool commands
1523 :     into pathconfig.
1524 :    
1525 :     ----------------------------------------------------------------------
1526 :     Name: Matthias Blume
1527 : blume 932 Date: 2001/09/18 15:35:00 EDT
1528 :     Tag: blume-20010918-readme11036
1529 :     Description:
1530 :    
1531 :     Added README files.
1532 :    
1533 :     ----------------------------------------------------------------------
1534 :     Name: Matthias Blume
1535 : blume 929 Date: 2001/09/18 11:45:00 EDT
1536 :     Tag: Release_110_36 (retag)
1537 :     Description:
1538 :    
1539 :     Fixed mistake in config/preloads. Retagged as 110.36.
1540 :    
1541 :     ----------------------------------------------------------------------
1542 :     Name: Matthias Blume
1543 : blume 928 Date: 2001/09/18 09:40:00 EDT
1544 : blume 929 Tag: Release_110_36_orig (tag changed)
1545 : blume 928 Description:
1546 :    
1547 :     New version (110.36). New bootfiles.
1548 :    
1549 :     ----------------------------------------------------------------------
1550 :     Name: Matthias Blume
1551 : blume 927 Date: 2001/09/14 16:15:00 EDT
1552 :     Tag: blume-20010914-x86fastfp
1553 :     Description:
1554 :    
1555 :     John committed some changes that Allen made, in particular a (hopefully)
1556 :     correctly working version of the x86-fp module.
1557 :    
1558 :     I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
1559 :     flag to "true". Everything seems to compile to a fixpoint ok, and
1560 :     "mandelbrot" speeds up by about 15%.
1561 :    
1562 :     ----------------------------------------------------------------------
1563 :     Name: Matthias Blume
1564 : blume 923 Date: 2001/09/13 11:20:00 EDT
1565 :     Tag: blume-20010913-minimal
1566 :     Description:
1567 :    
1568 :     1. Stefan Monnier's patch to fix a miscompilation problem that
1569 :     was brought to light by John Reppy's work on Moby.
1570 :    
1571 :     2. Implemented a minimal "structure Compiler" that contains just
1572 :     "version" and "architecture". The minimal version will be
1573 :     available when the full version is not. This is for backward-
1574 :     compatibility with code that wants to test Compiler.version.
1575 :    
1576 :     ----------------------------------------------------------------------
1577 :     Name: Matthias Blume
1578 : blume 920 Date: 2001/08/28 14:03:00 EDT
1579 :     Tag: blume-20010828-ml-lex
1580 :     Description:
1581 :    
1582 :     Fix for bug 1581, received from Neophytos Michael.
1583 :    
1584 :     ----------------------------------------------------------------------
1585 :     Name: Matthias Blume
1586 : blume 918 Date: 2001/08/27 11:20:00 EDT
1587 :     Tag: blume-20010827-readme11035
1588 :     Description:
1589 :    
1590 :     Fleshed out the README file for 110.35.
1591 :    
1592 :     ----------------------------------------------------------------------
1593 :     Name: Matthias Blume
1594 : blume 916 Date: 2001/08/24 17:10:00 EDT
1595 :     Tag: Release_110_35
1596 :     Description:
1597 :    
1598 :     New version number (110.35). New bootfiles.
1599 :    
1600 :     ----------------------------------------------------------------------
1601 : george 915 Name: Lal George
1602 : george 909 Date: 2001/08/24 13:47:18 EDT 2001
1603 :     Tag: george-20010824-MLRISC-graphs
1604 :     Description:
1605 :    
1606 :     removed clusters from MLRISC completely and replaced with graphs.
1607 :    
1608 :     ----------------------------------------------------------------------
1609 :     Name: Matthias Blume
1610 : blume 905 Date: 2001/08/23 17:50:00 EDT
1611 :     Tag: blume-20010823-toplevel
1612 :     Description:
1613 :    
1614 :     - some reorganization of the code that implements various kinds of
1615 :     environments in the compiler (static, dynamic, symbolic, combined)
1616 :     - re-implemented the EnvRef module so that evalStream works properly
1617 :     (if the stream contains references to "use", "CM.make", etc.)
1618 :     - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
1619 :    
1620 :     ----------------------------------------------------------------------
1621 :     Name: Matthias Blume
1622 : blume 904 Date: 2001/08/20 15:50 EDT
1623 :     Tag: blume20010820-slipup
1624 :     Description:
1625 :    
1626 :     I forgot to commit a few files. Here they are...
1627 :    
1628 :     ----------------------------------------------------------------------
1629 :     Name: Matthias Blume
1630 : blume 903 Date: 2001/08/20 15:35:00 EDT
1631 :     Tag: blume-20010820-debugprof
1632 :     Description:
1633 :    
1634 :     !!!! NEW BOOTFILES !!!!
1635 :    
1636 :     This is another round of reorganizing the compiler sources. This
1637 :     time the main goal was to factor out all the "instrumentation"
1638 :     passes (for profiling and backtracing) into their own library.
1639 :     The difficulty was to do it in such a way that it does not depend
1640 :     on elaborate.cm but only on elabdata.cm.
1641 :    
1642 :     Therefore there have been further changes to both elaborate.cm and
1643 :     elabdata.cm -- more "generic" things have been moved from the former
1644 :     to the latter. As a result, I was forced to split the assignment
1645 :     of numbers indicating "primtyc"s into two portions: SML-generic and
1646 :     SML/NJ-specific. Since it would have been awkward to maintain,
1647 :     I bit the bullet and actually _changed_ the mapping between these
1648 :     numbers and primtycs. The bottom line of this is that you need
1649 :     a new set of bin- and bootfiles.
1650 :    
1651 :     I have built new bootfiles for all architectures, so doing a fresh
1652 :     checkout and config/install.sh should be all you need.
1653 :    
1654 :     The newly created library's name is
1655 :    
1656 :     $smlnj/viscomp/debugprof.cm
1657 :    
1658 :     and its sources live under
1659 :    
1660 :     src/compiler/DebugProf
1661 :    
1662 :     ----------------------------------------------------------------------
1663 :     Name: Matthias Blume
1664 : blume 902 Date: 2001/08/15 17:15:00 EDT
1665 :     Tag: blume-20010815-compreorg
1666 :     Description:
1667 :    
1668 :     This is a first cut at reorganizing the CM libraries that make up the
1669 :     core of the compiler. The idea is to separate out pieces that could
1670 :     be used independently by tools, e.g., the parser, the typechecker, etc.
1671 :    
1672 :     The current status is a step in this direction, but it is not quite
1673 :     satisfactory yet. Expect more changes in the future.
1674 :    
1675 :     Here is the current (new) organization...
1676 :    
1677 :     What used to be $smlnj/viscomp/core.cm is now divided into
1678 :     six CM libraries:
1679 :    
1680 :     $smlnj/viscomp/basics.cm
1681 :     /parser.cm
1682 :     /elabdata.cm
1683 :     /elaborate.cm
1684 :     /execute.cm
1685 :     /core.cm
1686 :    
1687 :     The CM files for these libraries live under src/system/smlnj/viscomp.
1688 :     All these libraries are proxy libraries that contain precisely
1689 :     one CM library component. Here are the locations of the components
1690 :     (all within the src/compiler tree):
1691 :    
1692 :     Basics/basics.cm
1693 :     Parse/parser.cm
1694 :     ElabData/elabdata.cm
1695 :     Elaborator/elaborate.cm
1696 :     Execution/execute.cm
1697 :     core.cm
1698 :    
1699 :     [This organization is the same that has been used already
1700 :     for a while for the architecture-specific parts of the visible
1701 :     compiler and for the old version of core.cm.]
1702 :    
1703 :     As you will notice, many source files have been moved from their
1704 :     respective original locations to a new home in one of the above
1705 :     subtrees.
1706 :    
1707 :     The division of labor between the new libraries is the following:
1708 :    
1709 :     basics.cm:
1710 :     - Simple, basic definitions that pertain to many (or all) of
1711 :     the other libraries.
1712 :     parser.cm:
1713 :     - The SML parser, producing output of type Ast.dec.
1714 :     - The type family for Ast is also defined and exported here.
1715 :     elabdata.cm:
1716 :     - The datatypes that describe input and output of the elaborator.
1717 :     This includes types, absyn, and static environments.
1718 :     elaborator.cm:
1719 :     - The SML/NJ type checker and elaborator.
1720 :     This maps an Ast.dec (with a given static environment) to
1721 :     an Absyn.dec (with a new static environment).
1722 :     - This libraries implements certain modules that used to be
1723 :     structures as functors (to remove dependencies on FLINT).
1724 :     execute.cm:
1725 :     - Everything having to do with executing binary code objects.
1726 :     - Dynamic environments.
1727 :     core.cm:
1728 :     - SML/NJ-specific instantiations of the elaborator and MLRISC.
1729 :     - Top-level modules.
1730 :     - FLINT (this should eventually become its own library)
1731 :    
1732 :     Notes:
1733 :    
1734 :     I am not 100% happy with the way I separated the elaborator (and its
1735 :     data structures) from FLINT. Two instances of the same problem:
1736 :    
1737 :     1. Data structures contain certain fields that carry FLINT-specific
1738 :     information. I hacked around this using exn and the property list
1739 :     module from smlnj-lib. But the fact that there are middle-end
1740 :     specific fields around at all is a bit annoying.
1741 :    
1742 :     2. The elaborator calculates certain FLINT-related information. I tried
1743 :     to make this as abstract as I could using functorization, but, again,
1744 :     the fact that the elaborator has to perform calculations on behalf
1745 :     of the middle-end at all is not nice.
1746 :    
1747 :     3. Having to used exn and property lists is unfortunate because it
1748 :     weakens type checking. The other alternative (parameterizing
1749 :     nearly *everything*) is not appealing, though.
1750 :    
1751 :     I removed the "rebinding =" warning hack because due to the new organization
1752 :     it was awkward to maintain it. As a result, the compiler now issues some of
1753 :     these warnings when compiling init.cmi during bootstrap compilation. On
1754 :     the plus side, you also get a warning when you do, for example:
1755 :     val op = = Int32.+
1756 :     which was not the case up to now.
1757 :    
1758 :     I placed "assign" and "deref" into the _Core structure so that the
1759 :     code that deals with the "lazy" keyword can find them there. This
1760 :     removes the need for having access to the primitive environment
1761 :     during elaboration.
1762 :    
1763 :     ----------------------------------------------------------------------
1764 :     Name: Matthias Blume
1765 : blume 898 Date: 2001/08/13
1766 :     Tag: blume-20010813-closures
1767 :     Description:
1768 :    
1769 :     This fix was sent to us by Zhong Shao. It is supposed to improve the
1770 :     performance of certain loops by avoiding needless closure allocation.
1771 :    
1772 :     ----------------------------------------------------------------------
1773 : george 890 Name: Lal George
1774 : george 896 Date: 2001/07/31 10:03:23 EDT 2001
1775 :     Tag: george-20010731-x86-fmalloc
1776 :     Description: Fixed bug in x86 calls
1777 :    
1778 :     There was a bug where call instructions would mysteriously
1779 :     vanish. The call instruction had to be one that returned
1780 :     a floating point value.
1781 :    
1782 :     ----------------------------------------------------------------------
1783 :     Name: Lal George
1784 : george 890 Date: 2001/07/19 16:36:29 EDT 2001
1785 :     Tag: george-20010719-simple-cells
1786 :     Description:
1787 :    
1788 :     I have dramatically simplified the interface for CELLS in MLRISC.
1789 :    
1790 :     In summary, the cells interface is broken up into three parts:
1791 :    
1792 :     1. CellsBasis : CELLS_BASIS
1793 :    
1794 :     CellsBasis is a top level structure and common for all
1795 :     architectures. it contains the definitions of basic datatypes
1796 :     and utility functions over these types.
1797 :    
1798 :     2. functor Cells() : CELLS
1799 :    
1800 :     Cells generates an interface for CELLS that incorporates the
1801 :     specific resources on the target architecture, such as the
1802 :     presence of special register classes, their number and size,
1803 :     and various useful substructures.
1804 :    
1805 :     3. <ARCH>CELLS
1806 :    
1807 :     e.g. SparcCells: SPARCCELLS
1808 :    
1809 :     <ARCH>CELLS usually contains additional bindings for special
1810 :     registers on the architecture, such as:
1811 :    
1812 :     val r0 : cell (* register zero *)
1813 :     val y : cell (* Y register *)
1814 :     val psr : cell (* processor status register *)
1815 :     ...
1816 :    
1817 :     The structure returned by applying the Cells functor is opened
1818 :     in this interface.
1819 :    
1820 :     The main implication of all this is that the datatypes for cells is
1821 :     split between CellsBasis and CELLS -- a fairly simple change for user
1822 :     code.
1823 :    
1824 :     In the old scheme the CELLS interface had a definitional binding of
1825 :     the form:
1826 :    
1827 :     signature CELLS = sig
1828 :    
1829 :     structure CellsBasis = CellsBasis
1830 :    
1831 :     ...
1832 :    
1833 :     end
1834 :    
1835 :     With all the sharing constraints that goes on in MLRISC, this old
1836 :     design quickly leads to errors such as:
1837 :    
1838 :     "structure definition spec inside of sharing ... "
1839 :    
1840 :    
1841 :     and appears to require an unacceptable amount of sharing and where
1842 :     constraint hackery.
1843 :    
1844 :     I think this error message (the interaction of definitional specs and
1845 :     sharing) requires more explanation on our web page.
1846 :    
1847 :     ----------------------------------------------------------------------
1848 : blume 826 Name: Matthias Blume
1849 : blume 879 Date: 2001/07/19 15:00:00 EDT
1850 :     Tag: blume-20010719-libreorg
1851 :     Description:
1852 :    
1853 :     This update puts together a fairly extensive but straightforward change
1854 :     to the way the libraries that implement the interactive system are
1855 :     organized:
1856 :    
1857 :     The biggest change is the elimination of structure Compiler. As a
1858 :     replacement for this structure, there is now a CM library
1859 :     (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
1860 :     that exports all the substructures of the original structure Compiler
1861 :     directly. So instead of saying Compiler.Foo.bar one now simply
1862 :     says Foo.bar. (The CM libraries actually export a collection of
1863 :     structures that is richer than the collection of substructures of
1864 :     structure Compiler.)
1865 :    
1866 :     To make the transition smooth, there is a separate library called
1867 :     $smlnj/compiler/compiler.cm which puts together and exports the
1868 :     original structure Compiler (or at least something very close to it).
1869 :    
1870 :     There are five members of the original structure Compiler
1871 :     that are not exported directly but which instead became members
1872 :     of a new structure Backend (described by signature BACKEND). These are:
1873 :     structure Profile (: PROFILE), structure Compile (: COMPILE), structure
1874 :     Interact (: INTERACT), structure Machine (: MACHINE), and val
1875 :     architecture (: string).
1876 :    
1877 :     Structure Compiler.Version has become structure CompilerVersion.
1878 :    
1879 :     Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
1880 :     by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
1881 :     or x86, respectively.
1882 :     Each of these exports the same frontend structures that
1883 :     $smlnj/compiler.cm exports. But they do not have a structure Backend
1884 :     and instead export some structure <Arch>Backend where <Arch> is Alpha32,
1885 :     Hppa, PPC, Sparc, or X86, respectively.
1886 :    
1887 :     Library $smlnj/compiler/all.cm exports the union of the exports of
1888 :     $smlnj/compiler/<arch>.cm
1889 :    
1890 :     There are no structures <Arch>Compiler anymore, use
1891 :     $smlnj/compiler/<arch>.cm instead.
1892 :    
1893 :     Library host-compiler-0.cm is gone. Instead, the internal library
1894 :     that instantiates CM is now called cm0.cm. Selection of the host
1895 :     compiler (backend) is no longer done here but. (Responsibility for it
1896 :     now lies with $smlnj/compiler/current.cm. This seems to be more
1897 :     logical.)
1898 :    
1899 :     Many individual files have been moved or renamed. Some files have
1900 :     been split into multiple files, and some "dead" files have been deleted.
1901 :    
1902 :     Aside from these changes to library organization, there are also changes
1903 :     to the way the code itself is organized:
1904 :    
1905 :     Structure Binfile has been re-implemented in such a way that it no
1906 :     longer needs any knowledge of the compiler. It exclusively deals
1907 :     with the details of binfile layout. It no longer invokes the
1908 :     compiler (for the purpose of creating new prospective binfile
1909 :     content), and it no longer has any knowledge of how to interpret
1910 :     pickles.
1911 :    
1912 :     Structure Compile (: COMPILE) has been stripped down to the bare
1913 :     essentials of compilation. It no longer deals with linking/execution.
1914 :     The interface has been cleaned up considerably.
1915 :    
1916 :     Utility routines for dealing with linking and execution have been
1917 :     moved into their own substructures.
1918 :    
1919 :     (The ultimate goal of these changes is to provide a light-weight
1920 :     binfile loader/linker (at least for, e.g., stable libraries) that
1921 :     does not require CM or the compiler to be present.)
1922 :    
1923 :     CM documentation has been updated to reflect the changes to library
1924 :     organization.
1925 :    
1926 :     ----------------------------------------------------------------------
1927 :     Name: Matthias Blume
1928 : blume 875 Date: 2001/07/10 17:30:00 EDT
1929 :     Tag: Release_110_34
1930 :     Description:
1931 :    
1932 : blume 876 Minor tweak to 110.34 (re-tagged):
1933 :    
1934 :     - README.html file added to CVS repository
1935 :     - runtime compiles properly under FreeBSD 3.X and 4.X
1936 :    
1937 :     ----------------------------------------------------------------------
1938 :     Name: Matthias Blume
1939 :     Date: 2001/07/10 17:30:00 EDT
1940 :     Tag: Release_110_34
1941 :     Description:
1942 :    
1943 : blume 875 New version number (110.34). New bootfiles.
1944 :    
1945 :     ----------------------------------------------------------------------
1946 :     Name: Matthias Blume
1947 : blume 874 Date: 2001/07/09 16:00:00 EDT
1948 :     Tag: blume-20010709-more-varargs
1949 :     Description:
1950 :    
1951 :     I changed the handling of varargs in ml-nlffigen again:
1952 :     The ellipsis ... will now simply be ignored (with an accompanying warning).
1953 :    
1954 :     The immediate effect is that you can actually call a varargs function
1955 :     from ML -- but you can't actually supply any arguments beyond the ones
1956 :     specified explicitly. (For example, you can call printf with its format
1957 :     string, but you cannot pass additional arguments.)
1958 :    
1959 :     This behavior is only marginally more useful than the one before, but
1960 :     it has the advantage that a function or, more importantly, a function
1961 :     type never gets dropped on the floor, thus avoiding follow-up problems with
1962 :     other types that refer to the offending one.
1963 :    
1964 :     ----------------------------------------------------------------------
1965 :     Name: Matthias Blume
1966 : blume 873 Date: 2001/07/09 11:25:00 EDT
1967 :     Tag: blume-20010709-varargs
1968 :     Description:
1969 :    
1970 :     1. ckit-lib.cm now exports structure Error
1971 :     2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
1972 :     with a warning accompanied by a source location. Moreover, it
1973 :     merely skips the offending function or type and proceeds with the
1974 :     rest of its work.u As a result, one can safely feed C code containing
1975 :     "..." to ml-nlffigen.
1976 :     3. There are some internal improvements to CM, providing slightly
1977 :     more general string substitutions in the tools subsystem.
1978 :    
1979 :     ----------------------------------------------------------------------
1980 :     Name: Matthias Blume
1981 : blume 854 Date: 2001/06/27 15:10:00 EDT
1982 :     Tag: blume-20010627-concur
1983 :     Description:
1984 :    
1985 :     Fixed a small bug in CM's handling of parallel compilation.
1986 :     (You could observe the bug by Control-C-interrupting an ordinary
1987 :     CMB.make or CM.stabilize and then attaching some compile servers.
1988 :     The result was that all of a sudden the previously interrupted
1989 :     compilation would continue on its own. This was because of
1990 :     an over-optimization: CM did not bother to clean out certain queues
1991 :     when no servers were attached "anyway", resulting in the contents
1992 :     of these queues to grab control when new servers did get attached.)
1993 :    
1994 :     There is also another minor update to the CM manual.
1995 :    
1996 :     ----------------------------------------------------------------------
1997 :     Name: Matthias Blume
1998 : blume 853 Date: 2001/06/26 16:15:00 EDT
1999 :     Tag: blume-20010626-cmdoc
2000 :     Description:
2001 :    
2002 :     Minor typo fixed in CM manual (syntax diagram for libraries).
2003 :    
2004 :     ----------------------------------------------------------------------
2005 :     Name: Matthias Blume
2006 : blume 852 Date: 2001/06/25 22:55:00 EDT
2007 :     Tag: blume-20010625-x86pc
2008 :     Description:
2009 :    
2010 :     Fixed a nasty bug in the X86 assembly code that caused signal
2011 :     handlers to fail (crash) randomly.
2012 :    
2013 :     ----------------------------------------------------------------------
2014 :     Name: Matthias Blume
2015 : blume 846 Date: 2001/06/25 12:05:00 EDT
2016 :     Tag: blume-20010625-nlffigen
2017 :     Description:
2018 :    
2019 :     This update fixes a number of minor bugs in ml-nlffigen as reported by
2020 :     Nick Carter <nbc@andrew.cmu.edu>.
2021 :    
2022 :     1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
2023 :     2. Default names for generated files are now derived from the name of
2024 :     the C file *without its directory*. In particular, this causes generated
2025 :     files to be placed locally even if the C file is in some system directory.
2026 :     3. Default names for generated signatures and structures are also derived
2027 :     from the C file name without its directory. This avoids silly things
2028 :     like "structure GL/GL".
2029 :     (Other silly names are still possible because ml-nlffigen does not do
2030 : blume 847 a thorough check of whether generated names are legal ML identifiers.
2031 :     When in doubt, use command line arguments to force particular names.)
2032 : blume 846
2033 :     ----------------------------------------------------------------------
2034 :     Name: Matthias Blume
2035 : blume 845 Date: 2001/06/21 12:25:00 EDT
2036 :     Tag: blume-20010621-eXene
2037 :     Description:
2038 :    
2039 :     eXene now compiles and (sort of) works again.
2040 :    
2041 :     The library name (for version > 110.33) is $/eXene.cm.
2042 :    
2043 :     I also added an new example in src/eXene/examples/nbody. See the
2044 :     README file there for details.
2045 :    
2046 :     ----------------------------------------------------------------------
2047 :     Name: Matthias Blume
2048 : blume 844 Date: 2001/06/20 16:40:00 EDT
2049 :     Tag: blume-20010620-cml
2050 :     Description:
2051 :    
2052 :     CML now compiles and works again.
2053 :    
2054 :     Libraries (for version > 110.33):
2055 :    
2056 :     $cml/cml.cm Main CML library.
2057 :     $cml/basis.cm CML's version of $/basis.cm.
2058 :     $cml/cml-internal.cm Internal helper library.
2059 :     $cml/core-cml.cm Internal helper library.
2060 :     $cml-lib/trace-cml.cm Tracing facility.
2061 :     $cml-lib/smlnj-lib.cm CML's version of $/smlnj-lib.cm
2062 :    
2063 :     The installer (config/install.sh) has been taught how to properly
2064 :     install this stuff.
2065 :    
2066 :     ----------------------------------------------------------------------
2067 :     Name: Matthias Blume
2068 : blume 843 Date: 2001/06/19 17:55:00 EDT
2069 :     Tag: blume-20010619-instantiate
2070 :     Description:
2071 :    
2072 :     This un-breaks the fix for bug 1432.
2073 :     (The bug was originally fixed in 110.9 but I broke it again some
2074 :     time after that.)
2075 :    
2076 :     ----------------------------------------------------------------------
2077 :     Name: Matthias Blume
2078 : blume 842 Date: 2001/06/19 17:25:00 EDT
2079 :     Tag: blume-20010619-signals
2080 :     Description:
2081 :    
2082 :     This should (hopefully) fix the long-standing signal handling bug.
2083 :     (The runtime system was constructing a continuation record with an
2084 :     incorrect descriptor which would cause the GC to drop data on the floor...)
2085 :    
2086 :     ----------------------------------------------------------------------
2087 :     Name: Matthias Blume
2088 : blume 840 Date: 2001/06/15 15:05:00 EDT
2089 : blume 841 Tag: blume-20010615-moresparc
2090 :     Description:
2091 :    
2092 :     Here is a short late-hour update related to Sparc c-calls:
2093 :    
2094 :     -- made handling of double-word arguments a bit smarter
2095 :    
2096 :     -- instruction selection phase tries to collapse certain clumsily
2097 :     constructed ML-Trees; typical example:
2098 :    
2099 :     ADD(ty,ADD(_,e,LI d1),LI d2) -> ADD(ty,e,LI(d1+d2))
2100 :    
2101 :     This currently has no further impact on SML/NJ since mlriscGen does
2102 :     not seem to generate such patterns in the first place, and c-calls
2103 :     (which did generate them in the beginning) has meanwhile been fixed
2104 :     so as to avoid them as well.
2105 :    
2106 :     ----------------------------------------------------------------------
2107 :     Name: Matthias Blume
2108 :     Date: 2001/06/15 15:05:00 EDT
2109 : blume 840 Tag: blume-20010615-sparc
2110 :     Description:
2111 :    
2112 :     The purpose of this update is to provide an implementation of NLFFI
2113 :     on Sparc machines.
2114 :    
2115 :     Here are the changes in detail:
2116 :    
2117 :     * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
2118 :     the Sparc implementation of the c-calls API.
2119 :     * The Sparc backend of SML/NJ has been modified to uniformely use %fp
2120 :     for accessing the ML frame. Thus, we have a real frame pointer and
2121 :     can freely modify %sp without need for an omit-frame-ptr phase.
2122 :     The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
2123 :     this case.
2124 :     * ml-nlffigen has been taught to produce code for different architectures
2125 :     and calling conventions.
2126 :     * In a way similar to what was done in the x86 case, the Sparc
2127 :     backend uses its own specific extension to mltree. (For example,
2128 :     it needs to be able to generate UNIMP instructions which are part
2129 :     of the calling convention.)
2130 :     * ml-nlffi-lib was reorganized to make it more modular (in particular,
2131 :     to make it easier to plug in new machine- and os-dependent parts).
2132 :    
2133 :     There are some other fairly unrelated bug fixes and cleanups as well:
2134 :    
2135 :     * I further hacked the .cm files for MLRISC tools (like MDLGen) so
2136 :     that they properly share their libraries with existing SML/NJ libraries.
2137 :     * I fixed a minor cosmetic bug in CM, supressing certain spurious
2138 :     follow-up error messages.
2139 :     * Updates to CM/CMB documentation.
2140 :    
2141 :     TODO items:
2142 :    
2143 :     * MLRISC should use a different register as its asmTemp on the Sparc.
2144 :     (The current %o2 is a really bad choice because it is part of the
2145 :     calling conventions, so things might interfere in unexpected ways.)
2146 :    
2147 :     ----------------------------------------------------------------------
2148 :     Name: Matthias Blume
2149 : blume 839 Date: 2001/06/07
2150 :     Tag: blume-20010607-calls
2151 :     Description:
2152 :    
2153 :     A number of internal changes related to C calls and calling conventions:
2154 :    
2155 :     1. ML-Tree CALL statements now carry a "pops" field. It indicates the
2156 :     number of bytes popped implicitly (by the callee). In most cases
2157 :     this field is 0 but on x86/win32 it is some non-zero value. This
2158 :     is information provided for the benefit of the "omit-frameptr" pass.
2159 :     2. The CALL instruction on the x86 carries a similar "pops" field.
2160 :     The instruction selection phase copies its value from the ML-Tree
2161 :     CALL statement.
2162 :     3. On all other architectures, the instruction selection phase checks
2163 :     whether "pops=0" and complains if not.
2164 :     4. The c-calls implementation for x86 now accepts two calling conventions:
2165 :     "ccall" and "stdcall". When "ccall" is selected, the caller cleans
2166 :     up after the call and pops is set to 0. For "stdcall", the caller
2167 :     does nothing, leaving the cleanup to the callee; pops is set to
2168 :     the number of bytes that were pushed onto the stack.
2169 :     5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
2170 :     distinguish between "ccall" and "stdcall".
2171 :     6. The UNIMP instruction has been added to the supported Sparc instruction
2172 :     set. (This is needed for implementing the official C calling convention
2173 :     on this architecture.)
2174 :     7. I fixed some of the .cm files under src/MLRISC/Tools to make them
2175 :     work with the latest CM.
2176 :    
2177 :     ----------------------------------------------------------------------
2178 :     Name: Matthias Blume
2179 : blume 838 Date: 2001/06/05 15:10:00 EDT
2180 :     Tag: blume-20010605-cm-index
2181 :     Description:
2182 :    
2183 :     0. The "lambdasplit" parameter for class "sml" in CM has been documented.
2184 :    
2185 :     1. CM can now generate "index files". These are human-readable files
2186 :     that list on a per-.cm-file basis each toplevel symbol defined or
2187 :     imported. The location of the index file for
2188 :     <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
2189 :     To enable index-file generation, set CM.Control.generate_index to true
2190 :     or export an environment-symbol: export CM_GENERATE_INDEX=true.
2191 :    
2192 :     The CM manual has been updated accordingly.
2193 :    
2194 :     2. I made some slight modifications to the c-calls API in MLRISC.
2195 :    
2196 :     a) There is now a callback to support saving/restoring of
2197 :     dedicated but caller-save registers around the actual call
2198 :     instruction.
2199 :     b) One can optionally specify a comment-annotation for the
2200 :     call instruction.
2201 :    
2202 :     3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
2203 :     (For example, the comment annotation shows the C prototype of
2204 :     the function being called.)
2205 :    
2206 :     ----------------------------------------------------------------------
2207 :     Name: Matthias Blume
2208 : blume 837 Date: 2001/06/01 13:30:00 EDT
2209 :     Tag: blume-20010601-nlffi-cleanup
2210 :     Description:
2211 :    
2212 :     This is mostly a cleanup of MLFFI stuff:
2213 :    
2214 :     - some signature files have been put into a more exposed place
2215 :     - the ugly 'f type parameter is gone (simplifies types tremendously!)
2216 :     - ml-nlffigen changed accordingly
2217 :     - tutorial updated
2218 :    
2219 :     Other changes:
2220 :    
2221 :     - author's affiliation in CM manual(s) updated
2222 :     - some more recognized keywords added to Allen's sml.sty
2223 :    
2224 :     ----------------------------------------------------------------------
2225 :     Name: Matthias Blume
2226 : blume 836 Date: 2001/05/25 15:30:00 EDT
2227 :     Tag: blume-20010525-iptr
2228 :     Description:
2229 :    
2230 :     - put the official 110.33-README (as it appears on the ftp server) under
2231 :     CVS
2232 :     - fixed a small bug related to incomplete pointer types in
2233 :     ml-nlffigen
2234 :     - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
2235 :     (it does not need the 'f type parameter)
2236 :    
2237 :     ----------------------------------------------------------------------
2238 :     Name: Matthias Blume
2239 : blume 834 Date: 2001/05/23 14:30:00 EDT
2240 :     Tag: Release_110_33
2241 :     Description:
2242 :    
2243 :     New version number (110.33). New bootfiles.
2244 :    
2245 :     ----------------------------------------------------------------------
2246 :     Name: Matthias Blume
2247 : blume 833 Date: 2001/05/22 18:06:00 EDT
2248 :     Tag: blume-20010522-targets
2249 :     Description:
2250 :    
2251 :     Made install.sh use file config/targets.customized if it exists, falling
2252 :     back to config/targets if it doesn't. This way one can have a customized
2253 :     version of the targets file without touching the "real thing", thus
2254 :     eliminating the constant fear of accidentally checking something bogus
2255 :     back into the CVS repository... (File config/targets.customized must
2256 :     not be added to the repository!)
2257 :    
2258 :     ----------------------------------------------------------------------
2259 :     Name: Matthias Blume
2260 : blume 832 Date: 2001/05/22 16:30:00 EDT
2261 :     Tag: blume-20010522-minitut
2262 :     Description:
2263 :    
2264 :     1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
2265 :     struct returns.
2266 :     2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt. This is some very
2267 :     incomplete, preliminary documentation for NLFFI.
2268 :    
2269 :     ----------------------------------------------------------------------
2270 :     Name: Matthias Blume
2271 : blume 829 Date: 2001/05/14 11:30:00 EDT
2272 :     Tag: blume-20010514-script
2273 :     Description:
2274 :    
2275 :     Some bugs in install script fixed.
2276 :    
2277 :     In addition to that I also made a slight change to the NLFFI API:
2278 :     Functors generated by ml-nlffigen now take the dynamic library as a
2279 :     straight functor argument, not as a suspended one. (The original
2280 :     functor code used to force the suspension right away anyway, so there
2281 :     was nothing gained by this complication of the interface.)
2282 :    
2283 :     ----------------------------------------------------------------------
2284 :     Name: Matthias Blume
2285 : blume 828 Date: 2001/05/11 14:35:00 EDT
2286 :     Tag: blume-20010511-ml-nlffi
2287 :     Description:
2288 :    
2289 :     I finally took the plunge and added my new FFI code to the main
2290 :     repository. For x86-linux it is now ready for prime-time.
2291 :    
2292 :     There are two new subdirectories of "src":
2293 :    
2294 :     - ml-nlffi-lib:
2295 :     The utility library for programs using the FFI interface.
2296 :     Here is the implementation of $/c.cm and its associated low-level
2297 :     partners $/c-int.cm and $/memory.cm.
2298 :     - ml-nlffigen:
2299 :     A stand-alone program for generating ML glue code from C source
2300 :     code.
2301 :    
2302 :     Building ml-nlffigen requires $/ckit-lib.cm.
2303 :    
2304 :     The config/install.sh script has been updates to do the Right Thing
2305 :     (hopefully).
2306 :    
2307 :     Notice that the source tree for the C-Kit will not be put under "src"
2308 :     but directly under the installation root directory. (This is the
2309 :     structure that currently exists on the CVS server when you check out
2310 :     module "sml".) Fortunately, config/install.sh knows about this oddity.
2311 :    
2312 :     Bugs: No documentation yet.
2313 :    
2314 :     ----------------------------------------------------------------------
2315 :     Name: Matthias Blume
2316 : blume 826 Date: 2001/05/09 16:35:00 EDT
2317 :     Tag: blume-20010509-cpscontract
2318 :     Description:
2319 :    
2320 :     Fixed a bug in the accounting code in cpsopt/contract.sml. (The
2321 :     wrapper/unwrapper elimination did not decrement usage counts and some
2322 :     dead variables got overlooked by the dead-up logic.)
2323 :    
2324 :     ----------------------------------------------------------------------
2325 : george 824 Name: Lal George
2326 :     Date: 2001/05/08 17:26:09 EDT
2327 :     Tag: george-20010508-omit-frameptr
2328 :     Description:
2329 :    
2330 :     Changes to implement the omit-frame-pointer optimization to support
2331 :     raw C calls. For now, there is only support on the Intel x86, but
2332 :     other architectures will follow as more experience is gained with this.
2333 :    
2334 :    
2335 :     ----------------------------------------------------------------------
2336 : blume 818 Name: Matthias Blume
2337 : blume 819 Date: 2001/05/07 14:40:00 EDT
2338 :     Tag: blume-20010507-proxies
2339 :     Description:
2340 :    
2341 :     I made into "proxy libraries" all libraries that qualify for such a
2342 :     change. (A qualifying library is a library that has another library or
2343 :     groups as its sole member and repeats that member's export list
2344 :     verbatim. A proxy library avoids this repetition by omitting its export
2345 :     list, effectively inheriting the list that its (only) member exports.
2346 :     See the CM manual for more explanation.)
2347 :     The main effect is that explicit export lists for these libraries
2348 :     do not have to be kepts in sync, making maintenance a bit easier.
2349 :    
2350 :     I also added copyright notices to many .cm-files.
2351 :    
2352 :     Last but not least, I made a new set of bootfiles.
2353 :    
2354 :     ----------------------------------------------------------------------
2355 :     Name: Matthias Blume
2356 : blume 818 Date: 2001/05/04 17:00:00 EDT
2357 :     Tag: blume-20010504-cm-lsplit
2358 :     Description:
2359 :    
2360 :     0. John merged pending changes to $/smlnj-lib.cm
2361 :    
2362 :     1. Allen's previous change accidentally backed out of one of Lal's
2363 :     earlier changes. I undid this mistake (re-introducing Lal's change).
2364 :    
2365 :     2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
2366 :     within the compiler where applicable. There is some code simplification
2367 :     because of that.
2368 :    
2369 :     3. The "split" phase (in FLINT) is now part of the default list of phases.
2370 :     Compiler.Control.LambdaSplitting.* can be used to globally control the
2371 :     lambda-splitting (cross-module-inlining) engine. In addition to that,
2372 :     it can now also be controlled on a per-source basis: CM has been taught
2373 :     a new tool parameter applicable to ML source files.
2374 :    
2375 :     - To turn lambda-splitting off completely:
2376 :     local open Compiler.Control.LambdaSplitting in
2377 :     val _ = set Off
2378 :     end
2379 :     - To make "no lambda-splitting" the global default (but allow per-source
2380 :     overriding); this is the initial setting:
2381 :     local open Compiler.Control.LambdaSplitting in
2382 :     val _ = set (Default NONE)
2383 :     end
2384 :     - To make "lambda-splitting with aggressiveness a" the global default
2385 :     (and allow per-source overriding):
2386 :     local open Compiler.Control.LambdaSplitting in
2387 :     val _ = set (Default (SOME a))
2388 :     end
2389 :    
2390 :     - To turn lambda-splitting off for a given ML souce file (say: a.sml)
2391 :     write (in the respective .cm-file):
2392 :     a.sml (lambdasplitting:off)
2393 :     - To turn lambda-splitting for a.sml on with minimal aggressiveness:
2394 :     a.sml (lambdasplitting:on)
2395 :     - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
2396 :     <a> is a decimal non-negative integer):
2397 :     a.sml (lambdasplitting:<a>)
2398 :     - To turn lambda-splitting for a.sml on with maximal aggressiveness:
2399 :     a.sml (lambdasplitting:infinity)
2400 :     - To use the global default for a.sml:
2401 :     a.sml (lambdasplitting:default)
2402 :     or simply
2403 :     a.sml
2404 :    
2405 :     ----------------------------------------------------------------------
2406 : leunga 815 Name: Allen Leung
2407 :     Date: 2001/05/04 01:57:00 EDT
2408 :     Tag: leunga-20010504-sync
2409 :     Description:
2410 : leunga 788
2411 : leunga 815 MLRISC features.
2412 :    
2413 :     1. Fix to CMPXCHG instructions.
2414 :     2. Changed RA interface to allow annotations in callbacks.
2415 :     3. Added a new method to the stream interface to allow annotations updates.
2416 :    
2417 : george 749 ----------------------------------------------------------------------
2418 : blume 812 Name: Matthias Blume
2419 : blume 814 Date: 2001/05/01 11:45:00 EDT
2420 :     Tag: blume-20010501-pcedittmp
2421 :     Description:
2422 :    
2423 :     Changed install.sh to use the current working directory instead of
2424 :     /usr/tmp for a temporary file (pcedittmp). The previous choice
2425 :     of /usr/tmp caused trouble with MacOS X because of file premission
2426 :     problems.
2427 :    
2428 :     ----------------------------------------------------------------------
2429 :     Name: Matthias Blume
2430 : blume 812 Date: 2001/04/20 11:10:00 EDT
2431 :     Tag: blume-20010420-inMLflag
2432 :     Description:
2433 :    
2434 :     - added vp_limitPtrMask to vproc-state.h
2435 :     (for use by the raw-C-calls mechanism to implement proper interrupt
2436 :     handling)
2437 :     - made the ML compiler aware of various data-structure offsets so it
2438 :     can generate code for accessing the vp_inML flag and vp_limitPtrMask
2439 :     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
2440 :     raw C-calls
2441 :    
2442 :     ----------------------------------------------------------------------
2443 : george 810 Name: Lal George
2444 :     Date: 2001/04/20 09:15:28 EDT
2445 :     Tag: george-20010420-macosX
2446 :     Description:
2447 :    
2448 :     - Changes to port to Mac OS X; Darwin.
2449 :    
2450 :     - In the process I found that sqrt was broken on the PPC, because the
2451 :     fsqrt instruction is not implemented.
2452 :    
2453 :     ----------------------------------------------------------------------
2454 : blume 799 Name: Matthias Blume
2455 : blume 808 Date: 2001/04/18 12:45:00 EDT
2456 :     Tag: blume-20010418-ccalls
2457 :     Description:
2458 :    
2459 :     - fixed two off-by-4 errors in the x86-specific c-calls implementation
2460 :     (this bug prevented structure arguments containing pointers from being
2461 :     passed correctly)
2462 :     - changed the raw-C-call code in mlriscGen.sml in such a way that
2463 :     structure arguments are represented as a pointer to the beginning
2464 :     of the structure (instead of having a series of synthesized arguments,
2465 :     one for each structure member)
2466 :    
2467 :     - made makeml script's verbosity level configurable via environment
2468 :     variable (MAKEML_VERBOSITY)
2469 :    
2470 : blume 813 - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
2471 : blume 808 in rawmem-x86.sml; we are now using the real thing
2472 :    
2473 :     ----------------------------------------------------------------------
2474 :     Name: Matthias Blume
2475 : blume 806 Date: 2001/03/22 16:25:00 EST
2476 :     Tag: blume-20010322-bootfiles
2477 :     Description:
2478 :    
2479 :     Created a new set of bootfiles (for your automatic installation convenience).
2480 :    
2481 :     ----------------------------------------------------------------------
2482 :     Name: Matthias Blume
2483 : blume 805 Date: 2001/03/22 15:10:00 EST
2484 :     Tag: blume-20010322-rawmem-parcm
2485 :     Description:
2486 :    
2487 :     1. All "raw memory access" primitives for the new FFI are implemented now
2488 :     (at least on the x86).
2489 :     2. Some further cleanup of CM's parallel make mechanism.
2490 :    
2491 :     ----------------------------------------------------------------------
2492 :     Name: Matthias Blume
2493 : blume 801 Date: 2001/03/19 17:53:00 EST
2494 :     Tag: blume-20010319-parallel
2495 :     Description:
2496 :    
2497 :     Parallel make (using compile servers) now works again.
2498 :    
2499 :     To this end, CM.stabilize and CMB.make have been modified to work in
2500 :     two passes when compile servers are attached:
2501 :     1. Compile everything, do not perform stabilization; this pass
2502 :     uses compile servers
2503 :     2. Stabilize everything; this pass does not use compile servers
2504 :     If there are no compile servers, the two passes are combined into one
2505 :     (as before). Splitting the passes increases the inherent parallelism
2506 :     in the dependency graph because the entire graph including all
2507 :     libraries is available at the same time. This, in turn, improves
2508 :     server utilization. The downside is that the master process will
2509 :     have to do some extra work after compilation is done (because for
2510 :     technical reasons it must re-read all the binfiles during stabilization).
2511 :    
2512 :     ----------------------------------------------------------------------
2513 :     Name: Matthias Blume
2514 : blume 800 Date: 2001/03/16 12:22:00 EST
2515 :     Tag: blume-20010316-bootfiles
2516 :     Description:
2517 :    
2518 :     Created a new set of bootfiles (for your automatic installation convenience).
2519 :    
2520 :     ----------------------------------------------------------------------
2521 :     Name: Matthias Blume
2522 : blume 799 Date: 2001/03/16 11:00:00 EST
2523 :     Tag: blume-20010316-MLTREE-fixup
2524 :     Description:
2525 :    
2526 :     This is a minor fixup for an (untagged) earlier commit by Allen.
2527 :     (A file was missing).
2528 :    
2529 :     ----------------------------------------------------------------------
2530 : leunga 788 Name: Allen Leung
2531 : leunga 796 Date: Mon Mar 5 18:54:57 EST 2001
2532 :     Tag: leunga-20010305-cut-support
2533 :    
2534 :     1. New support for alternative control-flow in MLTREE.
2535 :     Currently we support
2536 :    
2537 :     FLOW_TO(CALL ...., [k1,...,kn])
2538 :    
2539 :     This is needed for 'cuts to' in C-- and try/handle-like constructs
2540 :     in Moby
2541 :    
2542 :     New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
2543 :    
2544 :     2. Register Allocator
2545 :    
2546 :     Changes in interface [from Fermin, John]
2547 :    
2548 :     3. Alpha 8-bit SLL support [Fermin]
2549 :    
2550 :     4. All architectures
2551 :    
2552 :     A new module (ClusterExpandCopies) for expanding parallel copies.
2553 :    
2554 :     ----------------------------------------------------------------------
2555 :     Name: Allen Leung
2556 : leunga 788 Date: 2001/02/27 23:07:00 EST
2557 :     Tag: leunga-20010227-minor-stuff
2558 :    
2559 :     1. Alpha bug fix for CMOVNE
2560 :     2. Handle mltree COND(..,FCMP ...,...)
2561 :     3. Bug fix in simplifier
2562 :    
2563 :     ----------------------------------------------------------------------
2564 : blume 777 Name: Matthias Blume
2565 : blume 781 Date: 2001/01/30 17:50:00 EST
2566 :     Tag: blume-20010130-sync
2567 :     Description:
2568 :    
2569 :     This is just a minor update to sync my devel branch with the main brach.
2570 :     The only visible change is the addition of some README files.
2571 :    
2572 :     ----------------------------------------------------------------------
2573 :     Name: Matthias Blume
2574 : blume 778 Date: 2001/01/12 23:30:00 JST
2575 :     Tag: blume-20010112-bootfiles
2576 :     Description:
2577 :    
2578 :     Made a new set of bootfiles that goes with the current state of the
2579 :     repository.
2580 :    
2581 :     ----------------------------------------------------------------------
2582 :     Name: Matthias Blume
2583 : blume 777 Date: 2001/01/12 21:20:00 JST
2584 :     Tag: blume-20010112-sync
2585 :     Description:
2586 :    
2587 :     I am just flushing out some minor changes that had accumulated in
2588 :     my private branch in order to sync with the main tree. (This is
2589 :     mainly because I had CVS trouble when trying to merge _into_ my
2590 :     private branch.)
2591 :    
2592 :     Most people should be completely unaffected by this.
2593 :    
2594 :     ----------------------------------------------------------------------
2595 : leunga 775 Name: Allen Leung
2596 :     Date: Thu Jan 11 21:03:00 EST 2001
2597 :     Tag: leunga-20010111-labexp=mltree
2598 :     Description:
2599 :    
2600 :     1. Removed the type LabelExp and replace it by MLTree.
2601 :     2. Rewritten mltree-simplify with the pattern matcher tool.
2602 :     3. There were some bugs in alpha code generator which would break
2603 :     64-bit code generation.
2604 :     4. Redo the tools to generate code with the
2605 :     5. The CM files in MLRISC (and in src/system/smlnj/MLRISC)
2606 :     are now generated by perl scripts.
2607 :    
2608 :     ----------------------------------------------------------------------
2609 : blume 771 Name: Matthias Blume
2610 : blume 774 Date: 2001/01/10 21:55:00 JST
2611 :     Tag: blume-20010110-rcc
2612 :     Description:
2613 :    
2614 :     The RCC stuff now seems to work (but only on the x86).
2615 :     This required hacking of the c-calls interface (and -implementation) in
2616 :     MLRISC.
2617 :    
2618 :     Normal compiler users should be unaffected.
2619 :    
2620 :     ----------------------------------------------------------------------
2621 :     Name: Matthias Blume
2622 : blume 773 Date: 2001/01/09 01:20:00 JST
2623 :     Tag: blume-20010109-rcc
2624 :     Description:
2625 :    
2626 :     This is a fairly big patch, flushing out a large number of pending
2627 :     changes that I made to my development copy over the last couple of days.
2628 :    
2629 :     Of practical relevance at this moment is a workaround for a pickling
2630 :     bug that Allen ran into the other day. The cause of the bug itself is
2631 :     still unknown and it might be hard to fix it properly, but the
2632 :     workaround has some merits of its own (namely somewhat reducing pickling
2633 :     overhead for certain libraries). Therefore, I think this solution should
2634 :     be satisfactory at this time.
2635 :    
2636 :     The rest of the changes (i.e., the vast majority) has to do with my
2637 :     ongoing efforts of providing direct support for C function calls from
2638 :     ML. At the moment there is a new primop "RAW_CCALL", typing magic
2639 :     in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
2640 :     case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
2641 :     translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
2642 :     handle RCC.
2643 :    
2644 :     The last part (the changes to mlriscGen.sml) are still known to be
2645 :     wrong on the x86 and not implemented on all other architectures. But
2646 :     the infrastructure is in place. I had to change a few functor
2647 :     signatures in the backend to be able to route the CCalls interface
2648 :     from MLRISC there, and I had to specialize the mltree type (on the
2649 :     x86) to include the necessary extensions. (The extensions themselves
2650 :     were already there and redy to go in MLRISC/x86).
2651 :    
2652 :     Everything should be very happy as soon as someone helps me with
2653 :     mlriscGen.sml...
2654 :    
2655 :     In any case, nothing of this should matter to anyone as long as the
2656 :     new primop is not being used (which is going to be the case unless you
2657 :     find it where I hid it :). The rest of the compiler is completely
2658 :     unaffected.
2659 :    
2660 :     ----------------------------------------------------------------------
2661 :     Name: Matthias Blume
2662 : blume 772 Date: 2001/01/05 00:30:00 JST
2663 :     Tag: blume-20010105-primops
2664 :     Description:
2665 :    
2666 :     Added some experimental support for work that I am doing right now.
2667 :     These changes mostly concern added primops, but there is also a new
2668 :     experimental C library in the runtime system (but currently not enabled
2669 :     anywhere except on Linux/X86).
2670 :    
2671 :     In the course of adding primops (and playing with them), I discovered that
2672 :     Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
2673 :     broken. (Zhong was very right he labeled this stuff as "major gross hack".)
2674 :     To recover, I made type information in INL_PRIM mandatory and changed
2675 :     prim.sml as well as built-in.sml accordingly. The InLine structure now
2676 :     has complete, correct type information (i.e., no bottom types).
2677 :    
2678 :     Since all these changes mean that we need new binfiles, I also bumped the
2679 :     version number to 110.32.1.
2680 :    
2681 :     ----------------------------------------------------------------------
2682 :     Name: Matthias Blume
2683 : blume 771 Date: 2000/12/30 22:10:00 JST
2684 :     Tag: blume-20001230-various
2685 :     Description:
2686 :    
2687 :     Added proxy libraries for MLRISC and let MLRISC libraries refer
2688 :     to each other using path anchors. (See CM manual for explanation.)
2689 :    
2690 :     Updated CM documentation.
2691 :    
2692 :     Fixed some bugs in CM.
2693 :    
2694 :     Implemented "proxy" libraries (= syntactic sugar for CM).
2695 :    
2696 :     Added "-quiet" option to makeml and changed runtime system accordingly.
2697 :    
2698 :     Added cleanup handler for exportML to reset timers and compiler stats.
2699 :    
2700 :     ----------------------------------------------------------------------
2701 : george 761 Name: Lal George
2702 :     Date: 2000/12/22 22:22:58 EST 2000
2703 :     Tag: Release_110_32
2704 :     Description:
2705 :    
2706 :     Infinite precision used throughout MLRISC.
2707 :     see MLRISC/mltree/machine-int.sig
2708 :    
2709 :     ----------------------------------------------------------------------
2710 : blume 756 Name: Matthias Blume
2711 : blume 760 Date: 2000/12/22 23:16:00 JST
2712 :     Tag: blume-20001222-warn
2713 :     Description:
2714 : blume 759
2715 : blume 760 Corrected wording and formatting of some CM warning message which I
2716 :     broke in my previous patch.
2717 : blume 759
2718 :     ----------------------------------------------------------------------
2719 :     Name: Matthias Blume
2720 : blume 763 Date: 2000/12/22 21:20:00 JST
2721 :     Tag: blume-20001222-anchorenv
2722 :     Description:
2723 :    
2724 :     Fixed CM's handling of anchor environments in connection with CMB.make.
2725 :    
2726 :     ----------------------------------------------------------------------
2727 :     Name: Matthias Blume
2728 : blume 758 Date: 2000/12/22 13:15:00 JST
2729 :     Tag: blume-20001222-cleanup
2730 :     Description:
2731 :    
2732 :     Removed src/cm/ffi which does not (and did not) belong here.
2733 :    
2734 :     ----------------------------------------------------------------------
2735 :     Name: Matthias Blume
2736 : blume 757 Date: 2000/12/21 23:55:00 JST
2737 :     Tag: blume-20001221-exn
2738 :     Description:
2739 :    
2740 :     Probably most important: CM no longer silently swallows all exceptions
2741 :     in the compiler.
2742 :     Plus: some other minor CM changes. For example, CM now reports some
2743 :     sizes for generated binfiles (code, data, envpickle, lambdapickle).
2744 :    
2745 :     ----------------------------------------------------------------------
2746 :     Name: Matthias Blume
2747 : blume 756 Date: 2000/12/15 00:01:05 JST
2748 :     Tag: blume-20001215-dirtool
2749 :     Description:
2750 :    
2751 :     - "dir" tool added.
2752 :     - improvements and cleanup to Tools structure
2753 :     - documentation updates
2754 :    
2755 :     ----------------------------------------------------------------------
2756 : leunga 752 Name: Allen Leung
2757 : leunga 755 Date: Thu Dec 14 03:45:24 EST 2000
2758 :     Description:
2759 :     Tag: leunga-20001214-int-inf
2760 :     Description:
2761 :    
2762 :     In IntInf, added these standard functions, which are missing from our
2763 :     implementation:
2764 :    
2765 :     andb : int * int -> int
2766 :     xorb : int * int -> int
2767 :     orb : int * int -> int
2768 :     notb : int -> int
2769 :     << : int * word -> int
2770 :     ~>> : int * word -> int
2771 :    
2772 :     Not tested, I hope they are correct.
2773 :    
2774 :     ----------------------------------------------------------------------
2775 :     Name: Allen Leung
2776 : leunga 752 Date: Fri Dec 8 19:23:26 EST 2000
2777 :     Description:
2778 :     Tag: leunga-20001208-nowhere
2779 :     Description:
2780 :    
2781 :     Slight improvements to the 'nowhere' tool to handle OR-patterns,
2782 :     to generate better error messages etc. Plus a brief manual.
2783 :    
2784 :     ----------------------------------------------------------------------
2785 : george 749 Name: Lal George
2786 :     Date: 2000/12/08 09:54:02 EST 2000
2787 :     Tag: Release_110_31
2788 :     Description:
2789 : george 705
2790 : george 749 - Version 110.31
2791 : leunga 591 ----------------------------------------------------------------------
2792 : leunga 744 Name: Allen Leung
2793 :     Date: Thu Dec 7 22:01:04 EST 2000
2794 :     Tag: leunga-20001207-cell-monster-hack
2795 :     Description:
2796 :    
2797 :     Major MLRISC internal changes. Affect all clients.
2798 :     Summary:
2799 :    
2800 :     1. Type CELLS.cell = int is now replaced by a datatype.
2801 :     As a result, the old regmap is now gone. Almost all interfaces
2802 :     in MLRISC change as a consequence.
2803 :    
2804 :     2. A new brand version of machine description tool (v3.0) that generates
2805 :     modules expecting the new interface. The old version is removed.
2806 :    
2807 :     3. The RA interface has been further abstracted into two new functors.
2808 :     RISC_RA and X86RA. These functors have much simpler interfaces.
2809 :     [See also directory MLRISC/demo.]
2810 :    
2811 :     4. Some other new source->source code generation tools are available:
2812 :    
2813 :     a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
2814 :     b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
2815 :     I use this tool to generate the peephole optimizers---with the new
2816 :     cell type changes, peephole rules are becoming difficult to write
2817 :     without conditional pattern matching.
2818 :    
2819 :     5. More Intmap -> IntHashTable change. Previous changes by Matthias didn't
2820 :     cover the entire MLRISC source tree so many things broke.
2821 :    
2822 :     6. CM files have been moved to the subdirectory MLRISC/cm.
2823 :     They are moved because there are a lot of them and they clutter up the
2824 :     root dir.
2825 :    
2826 :     7. More detailed documentation to come...
2827 :    
2828 :     NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
2829 :     a makeml -rebuild first. This is because of other other
2830 :     changes that Matthias has made (see below).
2831 :    
2832 :    
2833 :     ----------------------------------------------------------------------
2834 : blume 733 Name: Matthias Blume
2835 : blume 742 Date: 2000/11/30 23:12:00 JST
2836 :     Tag: blume-20001130-filereorg
2837 :     Description:
2838 :    
2839 :     Some manual updates and some file reorganizations in CM.
2840 :    
2841 :     ----------------------------------------------------------------------
2842 :     Name: Matthias Blume
2843 : blume 737 Date: 2000/11/24 17:45:00 JST
2844 :     Tag: blume-20001124-link
2845 :     Description:
2846 :    
2847 :     Drastically improved link traversal code for the case that the dynamic
2848 :     value was already loaded at bootstrap time. As a result, CM and CMB
2849 :     now both load blazingly fast -- even on a very slow machine. Also,
2850 :     memory consumption has been further reduced by this.
2851 :    
2852 :     Warning: The format of the PIDMAP file has changed. THerefore, to
2853 :     bootstrap you have to do this:
2854 :    
2855 :     1. Run CMB.make
2856 :     2. Make a symbolic link for the boot directory:
2857 :     ln -s sml.boot.ARCH-OS xxx
2858 :     3. "Rebuild" the boot directory:
2859 :     ./makeml -boot xxx -rebuild sml ; rm xxx
2860 :     4. Boot normally:
2861 :     ./makeml
2862 :    
2863 :     ----------------------------------------------------------------------
2864 :     Name: Matthias Blume
2865 : blume 735 Date: 2000/11/21 21:20:00 JST
2866 :     Tag: blume-20001121-tools
2867 :     Description:
2868 :    
2869 :     Continued hacking on autoloading problem -- with success this time.
2870 :     Also changed tool-plugin mechanism. See new CM manual.
2871 :    
2872 :     ----------------------------------------------------------------------
2873 :     Name: Matthias Blume
2874 : blume 734 Date: 2000/11/19 14:30:00 JST
2875 :     Tag: blume-20001119-autoload
2876 :     Description:
2877 :    
2878 :     Some hacking to make autoloading faster. Success for CMB, no success
2879 :     so far for CM. There is a reduced structure CM' that autoloads faster.
2880 :     (This is a temporary, non-documented hack to be eliminated again when
2881 :     the general problem is solved.)
2882 :    
2883 :     ----------------------------------------------------------------------
2884 :     Name: Matthias Blume
2885 : blume 733 Date: 2000/11/17 14:10:00 JST
2886 :     Tag: blume-20001117-pickle-lib
2887 :     Description:
2888 :    
2889 :     1. Eliminated comp-lib.cm
2890 :     2. Made pickle-lib.cm
2891 :     3. Eliminated all uses of intset.sml (from comp-lib.cm)
2892 :     4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
2893 :     equivalent constructs from smlnj-lib.cm (INtHashTable).
2894 :     5. Point 4. also goes for those uses of intmap.* in MLRISC.
2895 :     Duplicated intmap modules thrown out.
2896 :     6. Hunted down all duplicated SCC code and replaced it with
2897 :     equivalent stuff (GraphSCCFn from smlnj-lib.cm).
2898 :     7. Rewrote Feedback module.
2899 :     8. Moved sortedlist.sml into viscomp-lib.cm. Eventually it
2900 :     should be thrown out and equivalent modules from smlnj-lib.cm
2901 :     should be used (IntRedBlackSet, IntListSet, ...).
2902 :    
2903 :     Confirmed that compiler compiles to fixpoint.
2904 :    
2905 :     ----------------------------------------------------------------------
2906 : leunga 731 Name: Allen Leung
2907 :     Date: 2000/11/10 18:00:00
2908 :     Tag: leunga-20001110-new-x86-fp
2909 :    
2910 :     A new x86 floating point code generator has been added.
2911 :     By default this is turned off. To turn this on, do:
2912 :    
2913 :     CM.autoload "$smlnj/compiler.cm";
2914 :     Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
2915 :    
2916 :     Changes:
2917 :    
2918 :     1. Changed FTAN to FPTAN so that the assembly output is correct.
2919 :     2. Changed the extension callback for FTANGENT to generate:
2920 :    
2921 :     fptan
2922 :     fstp %st(0)
2923 :     instead of
2924 :     fptan
2925 :     fstpl ftempmem
2926 :    
2927 :     3. Numerous assembly fixes for x86.
2928 :    
2929 :     5. Cleaned up the machine code output module x86/x86MC.sml and added
2930 :     support for a whole bunch of instructions and addressing modes:
2931 :    
2932 :     fadd/fsub/fsubr/fmul/fdiv/fdivr %st, %st(n)
2933 :     faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp %st, %st(n)
2934 :     fadd/fsub/fsubr/fmul/fdiv/fdivr %st(n), %st
2935 :     fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
2936 :     fxch %st(n)
2937 :     fld %st(n)
2938 :     fst %st(n)
2939 :     fst mem
2940 :     fstp %st(n)
2941 :     fucom %st(n)
2942 :     fucomp %st(n)
2943 :    
2944 :     All these are now generated when the fast fp mode is turned on.
2945 :    
2946 :     6. Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
2947 :    
2948 :     ----------------------------------------------------------------------
2949 : blume 729 Name: Matthias Blume
2950 :     Date: 2000/11/09 11:20:00 JST
2951 :     Tag: blume-20001109-scc
2952 :     Description:
2953 :    
2954 :     Eliminated some code duplication:
2955 :    
2956 :     1. Added "where" clause to GraphSCCFn in SML/NJ Library.
2957 :     (Otherwise the functor is useless.)
2958 :     2. Used GraphSCCFn where SCCUtilFun was used previously.
2959 :     3. Got rid of SCCUtilFun (in comp-lib.cm).
2960 :    
2961 :     ----------------------------------------------------------------------
2962 : george 721 Name: Lal George
2963 :     Date: 2000/11/06 09:02:21 EST 2000
2964 :     Tag: Release_110_30
2965 :     Description:
2966 :    
2967 :     - Version 110.30
2968 :     ----------------------------------------------------------------------
2969 : blume 715 Name: Matthias Blume
2970 : blume 716 Date: 2000/11/04 14:45:00
2971 :     Tag: blume-20001104-mlbuild
2972 :     Description:
2973 :    
2974 :     - Made ml-build faster on startup.
2975 :     - Documentation fixes.
2976 :    
2977 :     ----------------------------------------------------------------------
2978 :     Name: Matthias Blume
2979 : blume 715 Date: 2000/11/02 17:00:00 JST
2980 :     Tag: blume-20001102-condcomp
2981 :     Description:
2982 :    
2983 :     - Small tweaks to pickler -- new BOOTFILES!
2984 :     - Version bumped to 110.29.2.
2985 :     - Added conditional compilation facility to init.cmi (see comment there).
2986 :     ----------------------------------------------------------------------
2987 : leunga 713 Name: Allen Leung
2988 :     Date: 2000/10/23 19:31:00
2989 :     Tag: leunga-20001023-demo-ra
2990 :    
2991 :     1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
2992 :     2. Test programs for the graph library updated
2993 :     3. Some new MLRISC demo programs added
2994 :    
2995 :     ----------------------------------------------------------------------
2996 : blume 710 Name: Matthias Blume
2997 : blume 711 Date: 2000/08/31 22:15:00 JST
2998 :     Tag: blume-20001017-errmsg
2999 :     Description:
3000 :    
3001 :     More error message grief: Where there used to be no messages, there
3002 :     now were some that had bogus error regions. Fixed.
3003 :    
3004 :     ----------------------------------------------------------------------
3005 :     Name: Matthias Blume
3006 : blume 710 Date: 2000/08/31 17:30:00 JST
3007 :     Tag: blume-20001017-v110p29p1
3008 :     Description:
3009 :    
3010 :     I made a version 110.29.1 with new bootfiles.
3011 :    
3012 :     Changes: Modified pickler/unpickler for faster and leaner unpickling.
3013 :     CM documentation changes and a small bugfix in CM's error reporting.
3014 :    
3015 :     ----------------------------------------------------------------------
3016 : george 705 Name: Lal George
3017 :     Date: 2000/09/27 14:42:35 EDT
3018 :     Tag: george-20000927-nodestatus
3019 :     Description:
3020 :    
3021 :     Changed the type of the nodestatus, so that:
3022 :    
3023 :     SPILLED(~1) is now SPILLED
3024 :     SPILLED(m) where m>=0 is now MEMREG(m)
3025 :     SPILLED(s) where s<~1 is now SPILL_LOC(~s)
3026 :    
3027 :     ----------------------------------------------------------------------
3028 : blume 697 Name: Matthias Blume
3029 : blume 703 Date: 2000/09/07 14:45:00 JST
3030 :     Tag: blume-20000907-cmerrmsg
3031 :     Description:
3032 :    
3033 :     Small tweak to CM to avoid getting ML syntax error messages twice.
3034 :    
3035 :     ----------------------------------------------------------------------
3036 :     Name: Matthias Blume
3037 : blume 701 Date: 2000/08/31 18:00:00 JST
3038 :     Tag: blume-20000831-cvsbootfiles
3039 :     Description:
3040 :    
3041 :     New URL for boot files (because the 110.29 files on the BL server do
3042 :     now work correctly with my updated install scripts for yacc and lex).
3043 :    
3044 :     ----------------------------------------------------------------------
3045 :     Name: Matthias Blume
3046 : blume 697 Date: 2000/08/08 12:33:00 JST
3047 :     Tag: blume-20000808-manual
3048 :     Description:
3049 :    
3050 :     Tiny update to CM manual.
3051 :    
3052 :     ----------------------------------------------------------------------
3053 : leunga 695 Name: Allen Leung
3054 :     Date: 2000/08/7 19:31:00
3055 :     Tag: leunga-20000807-a-whole-bunch-of-stuff
3056 :    
3057 :     Moby, C--, SSA, x86, machine descriptions etc. Should only affect C--
3058 :     and Mobdy.
3059 :    
3060 :     1. x86
3061 :    
3062 :     a. Fixes to peephole module by John and Dan.
3063 :     b. Assembly fix to SETcc by Allen.
3064 :     c. Fix to c-call by John.
3065 :     d. Fix to spilling by John. (This one deals with the missing FSTPT case)
3066 :     e. Instruction selection optimization to SETcc as suggested by John.
3067 :    
3068 :     For example,
3069 :    
3070 :     MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
3071 :    
3072 :     should generate:
3073 :    
3074 :     MOVL a, x
3075 :     SUBL b, x
3076 :     SHRL 31, x
3077 :    
3078 :     2. IR stuff
3079 :    
3080 :     A bunch of new DJ-graph related algorithms added. These
3081 :     speed up SSA construction.
3082 :    
3083 :     3. SSA + Scheduling
3084 :    
3085 :     Added code for SSA and scheduling to the repository
3086 :    
3087 :     ----------------------------------------------------------------------
3088 : george 694 Name: Lal George
3089 :     Date: 2000/07/27 11:53:14 EDT
3090 :    
3091 :     Tag: lal-20000727-linux-ppc
3092 :     Description:
3093 :    
3094 :     Made changes to support Linux PPC.
3095 :     p.s. I have confirmation that the 110.29 boot files work fine.
3096 :    
3097 :     ----------------------------------------------------------------------
3098 : blume 684 Name: Matthias Blume
3099 : blume 692 Date: 2000/07/27 17:40:00 JST
3100 :     Tag: blume-20000727-scripts
3101 :     Description:
3102 :    
3103 :     !!!! WARNING !!!!
3104 :     You must recompile the runtime system!
3105 :     !!!! WARNING !!!!
3106 :    
3107 :     This is basically another round of script-enhancements:
3108 :    
3109 :     1. sml, ml-build, and ml-makedepend accept options -D and -U to define
3110 :     and undefine CM preprocessor symbols.
3111 :    
3112 :     2. ml-build avoids generating a new heap image if it finds that the
3113 :     existing one is still ok. (The condition is that no ML file had to
3114 :     be recompiled and all ML files are found to be older that the heap
3115 :     file.)
3116 :    
3117 :     To make this work smoothly, I also hacked the runtime system as
3118 :     well as SMLofNJ.SysInfo to get access to the heap image suffix
3119 :     (.sparc-solaris, ...) that is currently being used.
3120 :    
3121 :     Moreover, the signature of CM.mk_standalone has changed. See the
3122 :     CM manual.
3123 :    
3124 :     3. ml-makedepend accepts additional options -n, -a, and -o. (See the
3125 :     CM manual for details.)
3126 :    
3127 :     4. More CM manual updates:
3128 :     - all of the above has been documented.
3129 :     - there is now a section describing the (CM-related) command line
3130 :     arguments that are accepted by the "sml" command
3131 :    
3132 :     ----------------------------------------------------------------------
3133 :     Name: Matthias Blume
3134 : blume 691 Date: 2000/07/25 16:20:00 JST
3135 :     Tag: blume-20000725-makedepend
3136 :     Description:
3137 :    
3138 :     Added a script called ml-makedepend. This can be used in makefiles
3139 :     for Unix' make in a way very similar to the "makedepend" command for
3140 :     C.
3141 :    
3142 :     The script internally uses function CM.sources.
3143 :    
3144 :     Synopsis:
3145 :    
3146 :     ml-makedepend [-f makefile] cmfile targetname
3147 :    
3148 :     The default for the makefile is "makefile" (or "Makefile" should
3149 :     "makefile" not exist).
3150 :    
3151 :     ml-makedepend adds a cmfile/targetname-specific section to this
3152 :     makefile (after removing the previous version of this section). The
3153 :     section contains a single dependency specification with targetname on
3154 :     the LHS (targetname is an arbitrary name), and a list of files derived
3155 :     from the cmfile on the RHS. Some of the files on the RHS are
3156 :     ARCH/OPSYS-specific. Therefore, ml-makedepend inserts references to
3157 :     "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
3158 :     path names. The makefile writer is responsible for making sure that
3159 :     these variables have correct at the time "make" is invoked.
3160 :    
3161 :     ----------------------------------------------------------------------
3162 :     Name: Matthias Blume
3163 : blume 690 Date: 2000/07/22 23:30:00 JST
3164 :     Tag: blume-20000722-urlupdate
3165 :     Description:
3166 :    
3167 :     Changed BOOT and config/srcarchiveurl to point to BL server:
3168 :    
3169 :     ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
3170 :    
3171 :     ----------------------------------------------------------------------
3172 :     Name: Matthias Blume
3173 : blume 686 Date: 2000/07/18 18:00:00 JST
3174 :     Tag: blume-20000718-Version_110_29
3175 :     Description:
3176 :    
3177 :     1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
3178 :    
3179 :     2. Updated config/version to 110.29
3180 :    
3181 :     3. Updated config/srcarchiveurl
3182 :    
3183 :     3. New boot files!
3184 :     ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
3185 :    
3186 :     ----------------------------------------------------------------------
3187 :     Name: Matthias Blume
3188 : blume 684 Date: 2000/07/11 13:58:00 JST
3189 :     Tag: blume-20000711-doctypo
3190 :     Description:
3191 :    
3192 :     Fixed a few typos in CM manual.
3193 :    
3194 :     ----------------------------------------------------------------------
3195 : leunga 683 Name: Allen Leung
3196 :     Date: 2000/06/15 00:38:00
3197 :     Tag: leunga-20000704-sparc-x86
3198 :    
3199 :     1. x86 peephole improvement sp += k; sp -= k => nop [from John]
3200 :     2. fix to x86 RET bug [found by Dan Grossman]
3201 :     3. sparc assembly bug fix for ticc instructions [found by Fermin]
3202 :    
3203 :     Affects c-- and moby only
3204 :    
3205 :     ----------------------------------------------------------------------
3206 : blume 680 Name: Matthias Blume
3207 : blume 682 Date: 2000/07/04 15:26:00
3208 :     Tag: blume-20000704-trigger
3209 :     Description:
3210 :    
3211 :     1. Improvements to CM manual.
3212 :     2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
3213 :     of getting a back-trace. The function, when called, raises an
3214 :     internal exception which explicitly carries the full back-trace history,
3215 :     so it is unaffected by any intervening handle-raise pairs ("trivial"
3216 :     or not). The interactive loop will print that history once it arrives
3217 :     at top level.
3218 :     Short of having all exceptions implicitly carry the full history, the
3219 :     recommended way of using this facility is:
3220 :     - compile your program with instrumentation "on"
3221 :     - run it, when it raises an exception, look at the history
3222 :     - if the history is "cut off" because of some handler, go and modify
3223 :     your program so that it explicitly calls BTrace.trigger
3224 :     - recompile (still instrumented), and rerun; look at the full history
3225 :    
3226 :     ----------------------------------------------------------------------
3227 :     Name: Matthias Blume
3228 :     Date: 2000/07/03 15:36:00 JST
3229 : blume 680 Tag: blume-20000702-manual
3230 :     Description:
3231 :    
3232 :     Small corrections and updates to CM manual.
3233 :    
3234 :     ----------------------------------------------------------------------
3235 : blume 682 Name: Matthias Blume
3236 : blume 679 Date: 2000/06/29 16:04:00 JST
3237 :     Tag: blume-20000629-yacctool
3238 :     Description:
3239 :    
3240 :     Changes:
3241 :    
3242 :     1. Class "mlyacc" now takes separate arguments to pass options to
3243 :     generated .sml- and .sig-files independently.
3244 :     2. Corresponding CM manual updates.
3245 :     3. BTrace module now also reports call sites. (However, for loop clusters
3246 :     it only shows from where the cluster was entered.) There are associated
3247 :     modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
3248 :    
3249 :     ----------------------------------------------------------------------
3250 : blume 675 Name: Matthias Blume
3251 : blume 678 Date: 2000/06/27 16:51:00 JST
3252 :     Tag: blume-20000627-noweb
3253 :     Description:
3254 :    
3255 :     Changes:
3256 :    
3257 :     1. Implemented "subdir" and "witness" options for noweb tool.
3258 :     This caused some slight internal changes in CM's tool implementation.
3259 :     2. Fixed bug in "tool plugin" mechanism. This is essentially cleaning
3260 :     some remaining issues from earlier path anchor changes.
3261 :     3. Updated CM manual accordingly.
3262 :    
3263 :     4. Changed implementation of back-tracing so that I now consider it
3264 :     ready for prime-time.
3265 :    
3266 :     In particular, you don't have to explicitly trigger the back-trace
3267 :     anymore. Instead, if you are running BTrace-instrumented code and
3268 :     there is an uncaught exception (regardless of whether or not it was
3269 :     raised in instrumented code), the top-level evalloop will print
3270 :     the back-trace.
3271 :    
3272 :     Features:
3273 :    
3274 :     - Instrumented and uninstrumented code work together seemlessly.
3275 :     (Of course, uninstrumented code is never mentioned in actual
3276 :     back-traces.)
3277 :    
3278 :     - Asymptotic time- and space-complexity of instrumented code is
3279 :     equal to that of uninstrumented code. (This means that
3280 :     tail-recursion is preserved by the instrumentation phase.)
3281 :    
3282 :     - Modules whose code has been instrumented in different sessions
3283 :     work together without problem.
3284 :    
3285 :     - There is no penalty whatsoever on uninstrumented code.
3286 :    
3287 :     - There is no penalty on "raise" expressions, even in
3288 :     instrumented code.
3289 :    
3290 :     A potential bug (or perhaps it is a feature, too):
3291 :    
3292 :     A back-trace reaches no further than the outermost instrumented
3293 :     non-trivial "raise". Here, a "trivial" raise is one that is the
3294 :     sole RHS of a "handle" rule. Thus, back-traces reach trough
3295 :    
3296 :     <exp> handle e => raise e
3297 :    
3298 :     and even
3299 :    
3300 :     <exp> handle Foo => raise Bar
3301 :    
3302 :     and, of course, through
3303 :    
3304 :     <exp> handle Foo => ...
3305 :    
3306 :     if the exception was not Foo.
3307 :    
3308 :     Back-traces always reach right through any un-instrumented code
3309 :     including any of its "handle" expressions, trivial or not.
3310 :    
3311 :     To try this out, do the following:
3312 :    
3313 :     - Erase all existing binfiles for your program.
3314 :     (You may keep binfiles for those modules where you think you
3315 :     definitely don't need back-tracing.)
3316 :     - Turn on back-trace instrumentation:
3317 :     SMLofNJ.Internals.BTrace.mode (SOME true);
3318 :     - Recompile your program. (I.e., run "CM.make" or "use".)
3319 :     - You may now turn instrumentation off again (if you want):
3320 :     SMLofNJ.Internals.BTrace.mode (SOME false);
3321 :     - Run your program as usual. If it raises an exception that
3322 :     reaches the interactive toplevel, then a back-trace will
3323 :     automatically be printed. After that, the toplevel loop
3324 :     will print the exception history as usual.
3325 :    
3326 :     ----------------------------------------------------------------------
3327 :     Name: Matthias Blume
3328 : blume 677 Date: 2000/06/26 09:56:46 JST
3329 :     Tag: blume-20000626-setup
3330 :     Description:
3331 :    
3332 :     CM: - setup-parameter to "sml" added; this can be used to run arbitrary
3333 :     ML code before and after compiling a file (e.g., to set compiler
3334 :     flags)
3335 :    
3336 :     Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
3337 :     - associated changes to btrace.sml (BTrace instrumentation pass)
3338 :     - cleaner implementation of btimp.sml (BTrace tracing and report
3339 :     module)
3340 :    
3341 :     CM manual: * new path encoding documented
3342 :     * description of setup-parameter to "sml" added
3343 :    
3344 :     The biggest user-visible change to back-tracing is that it is no
3345 :     longer necessary to compile all traced modules within the same
3346 :     session. (This was a real limitation.)
3347 :    
3348 :     ----------------------------------------------------------------------
3349 :     Name: Matthias Blume
3350 : blume 676 Date: 2000/06/24 12:40:00 JST
3351 :     Tag: blume-20000624-startup
3352 :     Description:
3353 :    
3354 :     Fixes startup slowdown problem. (I was calling SrcPath.sync a _tad_
3355 :     bit too often -- to put it mildly. :)
3356 :    
3357 :     ----------------------------------------------------------------------
3358 :     Name: Matthias Blume
3359 : blume 675 Date: 2000/06/23 18:20:00 JST
3360 :     Tag: blume-20000623-btrace
3361 :     Description:
3362 :    
3363 :     This updates adds a backtrace facility to aid programmers in debugging
3364 :     their programs. This involves the following changes:
3365 :    
3366 :     1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
3367 :     keeping track of the current call stack. When programs are compiled
3368 :     in a special mode, the compiler will insert calls to these hooks
3369 :     into the user program.
3370 :     "Hook" means that it is possible for different implementations of
3371 :     back-tracing to register themselves (at different times).
3372 :    
3373 :     2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
3374 :     as an Absyn.dec->Absyn.dec rewrite. Normally this phase is turned off.
3375 :     It can be turned on using this call:
3376 :     SMLofNJ.Internals.BTrace.mode (SOME true);
3377 :     Turning it off again:
3378 :     SMLofNJ.Internals.BTrace.mode (SOME false);
3379 :     Querying the current status:
3380 :     SMLofNJ.Internals.BTrace.mode NONE;
3381 :     Annotated programs are about twice as big as normal ones, and they
3382 :     run a factor of 2 to 4 slower with a dummy back-trace plugin (one
3383 :     where all hooks do nothing). The slowdown with a plugin that is
3384 :     actually useful (such as the one supplied by default) is even greater,
3385 :     but in the case of the default plugin it is still only an constant
3386 :     factor (amortized).
3387 :    
3388 :     3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
3389 :     with a sub-structure BTrace for controlling back-tracing. In particular,
3390 :     the above-mentioned function "mode" controls whether the annotation
3391 :     phase is invoked by the compiler. Another important function is
3392 :     "trigger": when called it aborts the current execution and causes
3393 :     the top-level loop to print a full back-trace.
3394 :    
3395 :     4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
3396 :     for back-tracing. It keeps track of the dynamic call stack and in
3397 :     addition to that it keeps a partial history at each "level" of that
3398 :     stack. For example, if a tail-calls b, b tail-calls c, and c tail-calls
3399 :     d and b (at separate times, dynamically), then the report will show:
3400 :    
3401 :     GOTO d
3402 :     /c
3403 :     GOTO \b
3404 :     CALL a
3405 :    
3406 :     This shows that there was an initial non-tail call of a, then a
3407 :     tail-call to b or c, looping behavior in a cluster of functions that
3408 :     consist of b and c, and then a goto from that cluster (i.e., either from
3409 :     b or from c) to d.
3410 :    
3411 :     Note that (depending on the user program) the amount of information
3412 :     that the back-trace module has to keep track of at each level is bounded
3413 :     by a constant. Thus, the whole implementation has the same asymptotical
3414 :     complexity as the original program (both in space and in time).
3415 :    
3416 :     5. compiler/TopLevel/interact/evalloop.sml has been modified to
3417 :     handle the special exception SMLofNJ.Internals.BTrace.BTrace
3418 :     which is raised by the "trigger" function mentioned above.
3419 :    
3420 :     Notes on usage:
3421 :    
3422 :     - Annotated code works well together with unannotated code:
3423 :     Unannotated calls simply do not show up at all in the backtrace.
3424 :    
3425 :     - It is not a good idea to let modules that were annotated during
3426 :     different sessions run at the same time. This is because the compiler
3427 :     chooses small integers to identify individual functions, and there
3428 :     will be clashes if different modules were compiled in separate sessions.
3429 :     (Nothing will crash, and you will even be told about the clashes, but
3430 :     back-trace information will in general not be useful.)
3431 :    
3432 :     - Back-tracing can be confused by callcc and capture.
3433 :    
3434 :     - The only way of getting a back-trace right now is to explicitly
3435 :     invoke the "trigger" function from your user program. Eventually, we
3436 :     should make every exception carry back-trace information (if
3437 :     available). But since this creates more overhead at "raise"-time
3438 :     (similar to the current exnHistory overhead), I have not yet
3439 :     implemented this. (The implementation will be rather easy.) With
3440 :     exceptions carrying back-trace information, this facility will be even
3441 :     more useful because users don't need to modify their programs...
3442 :    
3443 :     - While it is possible to compile the compiler with back-trace
3444 :     annotations turned on (I did it to get some confidence in
3445 :     correctness), you must make absolutely sure that core.sml and
3446 :     btimp.sml are compiled WITHOUT annotation! (core.sml cannot actually
3447 :     be compiled with annotation because there is no core access yet, but
3448 :     if you compile btimp.sml with annotation, then the system will go into
3449 :     an infinite recursion and crash.)
3450 :     Since CM currently does not know about BTrace, the only way to turn
3451 :     annotations on and off for different modules of the compiler is to
3452 :     interrupt CMB.make, change the settings, and re-invoke it. Of course,
3453 :     this is awkward and clumsy.
3454 :    
3455 :     Sample sessions:
3456 :    
3457 :     Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
3458 :     - SMLofNJ.Internals.BTrace.mode (SOME true);
3459 :     [autoloading]
3460 :     [autoloading done]
3461 :     val it = false : bool
3462 :     - structure X = struct
3463 :     - fun main n = let
3464 :     - fun a (x, 0) = d x
3465 :     - | a (x, n) = b (x, n - 1)
3466 :     - and b (x, n) = c (x, n)
3467 :     - and c (x, n) = a (x, n)
3468 :     - and d x = e (x, 3)
3469 :     - and e (x, 0) = f x
3470 :     - | e (x, n) = e (x, n - 1)
3471 :     - and f 0 = SMLofNJ.Internals.BTrace.trigger ()
3472 :     - | f n = n * g (n - 1)
3473 :     - and g n = a (n, 3)
3474 :     - in
3475 :     - f n
3476 :     - end
3477 :     - end;
3478 :     structure X : sig val main : int -> int end
3479 :     - X.main 3;
3480 :     *** BACK-TRACE ***
3481 :     GOTO stdIn:4.2-13.20: X.main[2].f
3482 :     GOTO-( stdIn:4.2-13.20: X.main[2].e
3483 :     GOTO stdIn:4.2-13.20: X.main[2].d
3484 :     / stdIn:4.2-13.20: X.main[2].a
3485 :     | stdIn:4.2-13.20: X.main[2].b
3486 :     GOTO-\ stdIn:4.2-13.20: X.main[2].c
3487 :     CALL stdIn:4.2-13.20: X.main[2].g
3488 :     GOTO stdIn:4.2-13.20: X.main[2].f
3489 :     GOTO-( stdIn:4.2-13.20: X.main[2].e
3490 :     GOTO stdIn:4.2-13.20: X.main[2].d
3491 :     / stdIn:4.2-13.20: X.main[2].a
3492 :     | stdIn:4.2-13.20: X.main[2].b
3493 :     GOTO-\ stdIn:4.2-13.20: X.main[2].c
3494 :     CALL stdIn:4.2-13.20: X.main[2].g
3495 :     GOTO stdIn:4.2-13.20: X.main[2].f
3496 :     GOTO-( stdIn:4.2-13.20: X.main[2].e
3497 :     GOTO stdIn:4.2-13.20: X.main[2].d
3498 :     / stdIn:4.2-13.20: X.main[2].a
3499 :     | stdIn:4.2-13.20: X.main[2].b
3500 :     GOTO-\ stdIn:4.2-13.20: X.main[2].c
3501 :     CALL stdIn:4.2-13.20: X.main[2].g
3502 :     GOTO stdIn:4.2-13.20: X.main[2].f
3503 :     CALL stdIn:2.15-17.4: X.main[2]
3504 :     -
3505 :    
3506 :     (Note that because of a FLINt bug the above code currently does not
3507 :     compile without BTrace turned on.)
3508 :    
3509 :     Here is another example, using my modified Tiger compiler:
3510 :    
3511 :     Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
3512 :     - SMLofNJ.Internals.BTrace.mode (SOME true);
3513 :     [autoloading]
3514 :     [autoloading done]
3515 :     val it = false : bool
3516 :     - CM.make "sources.cm";
3517 :     [autoloading]
3518 :     ...
3519 :     [autoloading done]
3520 :     [scanning sources.cm]
3521 :     [parsing (sources.cm):parse.sml]
3522 :     [creating directory CM/SKEL ...]
3523 :     [parsing (sources.cm):tiger.lex.sml]
3524 :     ...
3525 :     [wrote CM/sparc-unix/semant.sml]
3526 :     [compiling (sources.cm):main.sml]
3527 :     [wrote CM/sparc-unix/main.sml]
3528 :     [New bindings added.]
3529 :     val it = true : bool
3530 :     - Main.compile ("../testcases/merge.tig", "foo.out");
3531 :     *** BACK-TRACE ***
3532 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
3533 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
3534 :     CALL lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
3535 :     GOTO lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
3536 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
3537 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
3538 :     CALL lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
3539 :     / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
3540 :     CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
3541 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
3542 :     CALL lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
3543 :     CALL main.sml:1.18-118.4: Main.compile[2]
3544 :     -
3545 :    
3546 :     ----------------------------------------------------------------------
3547 : blume 673 Name: Matthias Blumen
3548 :     Date: 2000/06/21 18:00:00 JST
3549 :     Tag: blume-20000621-manual
3550 :     Description:
3551 :    
3552 :     CM manual update: Path environments documented.
3553 :    
3554 :     ----------------------------------------------------------------------
3555 : blume 666 Name: Matthias Blume
3556 : blume 672 Date: 2000/06/19 13:40:00
3557 :     Tag: blume-20000619-manual
3558 :     Description:
3559 :    
3560 :     CM manual and system/README update. This only covers the fact that
3561 :     there are no more implicit anchors. (Path environments and the "bind"
3562 :     option to "cm" have yet to be documented.)
3563 :    
3564 :     ----------------------------------------------------------------------
3565 :     Name: Matthias Blume
3566 : blume 671 Date: 2000/06/19 11:05:00 JST
3567 :     Tag: blume-20000619-chdir-bugfix
3568 :     Description:
3569 :    
3570 :     Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
3571 :    
3572 :     ----------------------------------------------------------------------
3573 :     Name: Matthias Blume
3574 : blume 670 Date: 2000/06/18 22:00:10 JST
3575 :     Tag: blume-20000618-implicit-anchors-really-gone
3576 :     Description:
3577 :    
3578 :     I updates the previous HISTORY entry where I forgot to mention that
3579 :     implicit anchors are no longer with us.
3580 :    
3581 :     The current update also gets rid of the (now useless) controller
3582 :     CM.Control.implicit_anchors.
3583 :    
3584 :     ----------------------------------------------------------------------
3585 :     Name: Matthias Blume
3586 : blume 666 Date: 2000/06/16 17:30:00 JST
3587 :     Tag: blume-20000616-anchorenv
3588 :     Description:
3589 :    
3590 :     This patch implements the long anticipated (just kidding :) "anchor
3591 :     environment" mechanism. In the course of doing this, I also
3592 :     re-implemented CM's internal "SrcPath" module from scratch. The new
3593 :     one should be more robust in certain boundary cases. In any case, it
3594 :     is a lot cleaner than its predecessor (IMHO).
3595 :    
3596 :     This time, although there is yet another boot file format change, I
3597 :     kept the unpickler backward-compatible. As a result, no new bootfiles
3598 :     are necessary and bootstrapping is straightforward. (You cannot read
3599 :     new bootfiles into an old system, but the other way around is no
3600 :     problem.)
3601 :    
3602 :     Visible changes:
3603 :    
3604 : blume 670 ** 0. Implicit path anchors (without the leading $-symbol) are no
3605 :     longer recognized at all. This means that such path names are not
3606 :     illegal either. For example, the name basis.cm simply refers to a
3607 :     local file called "basis.cm" (i.e, the name is an ordinary path
3608 :     relative to .cm-files directory). Or, to put it differently, only
3609 :     names that start with $ are anchored paths.
3610 : blume 666
3611 : blume 670 ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
3612 :     vanished.
3613 :    
3614 :     John (Reppy) had critizised this as soon as I originally proposed and
3615 : blume 666 implemented it, but at that time I did not really deeply believe
3616 :     him. :) Now I came full-circle because I need the $<singlearc> syntax
3617 :     in another place where it cannot be seen as an abbreviation for
3618 :     $/<singlearc>. To avoid the confusion, $<singlearc> now means what it
3619 :     seems to mean (i.e., it "expands" into the corresponding anchor
3620 :     value).
3621 :    
3622 :     However, when paths are used as members in CM description files, it
3623 :     continues to be true that there must be at least another arc after the
3624 :     anchor. This is now enforced separately during semantic analysis
3625 : blume 670 (i.e., from a lexical/syntactical point of view, the notation is ok.)
3626 : blume 666
3627 :     ** 2. The "cm" class now accepts an option "bind". The option's value
3628 :     is a sub-option list of precisely two items -- one labeled "anchor"
3629 :     and the other one labeled "value". As you might expect, "anchor" is
3630 :     used to specify an anchor name to be bound, and "value" specifies what
3631 :     the anchor is being bound to.
3632 :    
3633 :     The value must be a directory name and can be given in either standard
3634 :     syntax (including the possibility that it is itself an anchored path)
3635 :     or native syntax.
3636 :    
3637 :     Examples:
3638 :    
3639 :     foo.cm (bind:(anchor:bar value:$mystuff/bar))
3640 :     lib.cm (bind:(anchor:a value:"H:\\x\\y\\z")) (* only works under windows *)
3641 :    
3642 :     and so on.
3643 :    
3644 :     The meaning of this is that the .cm-file will be processed with an
3645 :     augmented anchor environment where the given anchor(s) is/are bound to
3646 :     the given values(s).
3647 :    
3648 :     The rationale for having this feature is this: Suppose you are trying
3649 :     to use two different (already stable) libraries a.cm and b.cm (that
3650 :     you perhaps didn't write yourself). Further, suppose each of these
3651 :     two libraries internally uses its own auxiliary library $aux/lib.cm.
3652 :     Normally you would now have a problem because the anchor "lib" can not
3653 :     be bound to more than one value globally. Therefore, the project that
3654 :     uses both a.cm and b.cm must locally redirect the anchor to some other
3655 :     place:
3656 :    
3657 :     a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
3658 :     b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
3659 :    
3660 :     This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
3661 :     /usr/lib/smlnj/b-stuff/aux.cm, respectively.
3662 :    
3663 :     Hard-wiring path names is a bit inflexible (and CM will verbosely warn
3664 :     you when you do so at the time of CM.stabilize). Therefore, you can
3665 :     also use an anchored path as the value:
3666 :    
3667 :     a.cm (bind:(anchor:lib value:$a-lib))
3668 :     b.cm (bind:(anchor:lib value:$b-lib))
3669 :    
3670 :     Now you can globally configure (using the usual CM.Anchor.anchor or
3671 :     pathconfig machinery) bindings for "a-lib" and "b-lib". Since "lib"
3672 :     itself is always locally bound, setting it globally is no longer
3673 :     meaningful or necessary (but it does not hurt either). In fact, "lib"
3674 :     can still be used as a global anchor for separate purposes. As a
3675 :     matter of fact, one can locally define "lib" in terms of a global
3676 :     "lib":
3677 :    
3678 :     a.cm (bind:(anchor:lib value:$lib/a))
3679 :     b.cm (bind:(anchor:lib value:$lib/b))
3680 :    
3681 :     ** 3: The encoding of path names has changed. This affects the way
3682 :     path names are shown in CM's progress report and also the internal
3683 :     protocol encoding used for parallel make.
3684 :    
3685 :     The encoding now uses one or more ':'-separated segments. Each
3686 :     segments corresponds to a file that has been specified relative to the
3687 :     file given by its preceding segment. The first segment is either
3688 :     relative to the CWD, absolute, or anchored. Each segment itself is
3689 :     basically a Unix pathname; all segments but the first are relative.
3690 :    
3691 :     Example:
3692 :    
3693 :     $foo/bar/baz.cm:a/b/c.sml
3694 :    
3695 :     This path denotes the file bar/a/b/c.sml relative to the directory
3696 :     denoted by anchor "foo". Notice that the encoding also includes
3697 :     baz.cm which is the .cm-file that listed a/b/c.sml. As usual, such
3698 :     paths are resolved relative to the .cm-files directory, so baz.cm must
3699 :     be ignored to get the "real" pathname.
3700 :    
3701 :     To make this fact more obvious, CM puts the names of such "virtual
3702 :     arcs" into parentheses when they appear in progress reports. (No
3703 :     parentheses will appear in the internal protocol encoding.) Thus,
3704 :     what you really see is:
3705 :    
3706 :     $foo/bar/(baz.cm):a/b/c.sml
3707 :    
3708 :     I find this notation to be much more informative than before.
3709 :    
3710 :     Another new feature of the encoding is that special characters
3711 :     including parentheses, colons, (back)slashes, and white space are
3712 :     written as \ddd (where ddd is the decimal encoding of the character).
3713 :    
3714 : blume 670 *** The CM manual still needs to be updated.
3715 :    
3716 : blume 666 ----------------------------------------------------------------------
3717 : leunga 660 Name: Allen Leung
3718 :     Date: 2000/06/15 00:38:00
3719 :     Tag: leunga-20000615-x86-peephole
3720 :    
3721 :     x86 Peephole fix by Fermin. Affects c-- and moby only.
3722 :    
3723 :     ----------------------------------------------------------------------
3724 : blume 658 Name: Matthias Blume
3725 :     Date: 2000/06/12 11:40:00
3726 :     Tag: blume-20000612-parmakefix
3727 :     Description:
3728 :    
3729 :     More cleanup after changing the file naming scheme: This time I
3730 :     repaired the parallel make mechanism for CMB.make which I broke earlier.
3731 :    
3732 :     ----------------------------------------------------------------------
3733 : leunga 657 Name: Allen Leung
3734 :     Date: 2000/06/09 01:25:00
3735 :     Tag: leunga-20000609-various
3736 :    
3737 :     None of these things should affect normal SML/NJ operations
3738 :    
3739 :     1. Peephole improvements provided by Fermin (c--)
3740 :     2. New annotation DEFUSE for adding extra dependence (moby)
3741 :     3. New X86 LOCK instructions (moby)
3742 :     4. New machine description language for reservation tables (scheduling)
3743 :     5. Fixes to various optimization/analysis modules (branch chaining, dominator
3744 :     trees etc.)
3745 :     6. I've changed the CM files so that they can work with versions
3746 :     110.0.6, 110.25 and 110.28
3747 :    
3748 :     ----------------------------------------------------------------------
3749 : blume 652 Name: Matthias Blume
3750 : blume 656 Date: 2000/06/09 12:40:00
3751 :     Tag: blume-20000609-log
3752 :     Description:
3753 :    
3754 :     - Removed all(?) remaining RCS Log entries from sources.
3755 :    
3756 :     - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
3757 :     anchored paths).
3758 :    
3759 :     ----------------------------------------------------------------------
3760 :     Name: Matthias Blume
3761 : blume 653 Date: 2000/06/07 17:00:00 JST
3762 :     Tag: blume-20000607-no-implicit-anchors
3763 :     Description:
3764 :    
3765 :     1. This update changes the default setting for
3766 :     CM.Control.implicit_anchors from true to false. This means that
3767 :     implicit anchors are no longer permitted by default. I also tried to
3768 :     make sure that nothing else still relies on implicit anchors.
3769 :     (This is the next step on the schedule towards a CM that does not even
3770 :     have the notion of implicit anchors anymore.)
3771 :    
3772 :     2. More CM manual updates.
3773 :    
3774 :     3. I managed to track down and fix the pickling bug I mentioned last
3775 :     time. Because of the previously existing workaround, this entails no
3776 :     immediate practical changes.
3777 :    
3778 :     ----------------------------------------------------------------------
3779 :     Name: Matthias Blume
3780 : blume 652 Date: 2000/06/06 11:15:00 JST
3781 :     Tag: blume-20000606-lazierpickle
3782 :     Description:
3783 :    
3784 :     !!!! NEW BOOT FILES !!!!
3785 :    
3786 :     * The main purpose of this update is to make library pickles lazier in
3787 :     order to reduce the initial space penalty for autoloading a library.
3788 :     As a result, it is now possible to have $smlnj/compiler.cm
3789 :     pre-registered. This should take care of the many complaints or
3790 :     inquiries about missing structure Compiler. This required changes to
3791 :     CM's internal data structures and small tweaks to some algorithms.
3792 :    
3793 :     As a neat additional effect, it is no longer necessary (for the sake
3794 :     of lean heap image files) to distinguish between a "minimal" CM and a
3795 :     "full" CM. Now, there is only one CM (i.e., the "full" version:
3796 :     $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
3797 :     interactive top level. ($smlnj/cm/minimal.cm is gone.)
3798 :    
3799 :     To make the life of compiler-hackers easier, "makeml" now also
3800 :     pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm). In other
3801 :     words, after you bootstrap a new sml for the first time, you will not
3802 :     have to autoload $smlnj/cmb.cm again afterwards. (The first time
3803 :     around you will still have to do it, though.)
3804 :    
3805 :     * A second change consists of major updates to the CM manual. There
3806 :     are now several appendices with summary information and also a full
3807 :     specification of the CM description file syntax.
3808 :    
3809 :     * In directory src/system I added the script "allcross". This script
3810 :     invokes sml and cross-compiles the compiler for all supported
3811 :     architectures. (Useful when providing a new set of boot files.)
3812 :    
3813 :     * There seems to be a latent bug in my "lazy pickles" mechanism. I
3814 :     added a small tweak to pickle-util.sml to work around this problem,
3815 :     but it is not a proper fix yet. I will investigate further. (The
3816 :     effect of the bug was an inflation of library pickle size.)
3817 :    
3818 :     * Version number increased to 110.28.1 (to avoid compatibility problems).
3819 :    
3820 :     ----------------------------------------------------------------------
3821 : leunga 646 Name: Allen Leung
3822 : leunga 648 Date: 2000/05/25 17:28 EDT
3823 :     Tag: leunga-20000525-ra
3824 :     Description:
3825 :    
3826 :     Fixed a bug in freezing phase of the register allocator.
3827 :    
3828 :     ----------------------------------------------------------------------
3829 :     Name: Allen Leung
3830 : leunga 647 Date: 2000/05/15 22:53 EDT
3831 : leunga 646 Tag: leunga-20000515-alpha-x86-ra
3832 :     Description:
3833 :    
3834 :     1. Alpha
3835 :    
3836 :     Slight cleanup. Removed the instruction SGNXL
3837 :    
3838 :     2. X86
3839 :    
3840 :     Added the following instructions to the instruction set:
3841 :    
3842 :     ROLx, RORx,
3843 :     BTx, BTSx, BTLx, BTRx,
3844 :     XCHGx, and variants with the LOCK prefix
3845 :    
3846 :     3. Register Allocation
3847 :    
3848 :     The module ra-rewrite-with-renaming has been improved.
3849 :    
3850 : leunga 647 These have no effect on SML/NJ.
3851 :    
3852 : leunga 646 ----------------------------------------------------------------------
3853 : blume 642 Name: Matthias Blume
3854 : blume 645 Date: 2000/05/15 16:20:00 JST
3855 :     Tag: blume-20000515-lightrebuild
3856 :     Description:
3857 :    
3858 :     1. I added an alternative to "-rebuild" to "makeml". The difference is
3859 :     that prior to calling CMB.make' the CM-variable "LIGHT" will be
3860 :     defined. In effect, the command will not build any cross-compiler
3861 :     backends and therefore finish more quickly.
3862 :    
3863 :     The "fixpt" script also takes a "-light" switch to be able to use
3864 :     this new facility while compiling for a fixpoint.
3865 :    
3866 :     2. I replaced all mentions of anchored paths in group owner specifications
3867 :     with simple relative paths (usually starting with "..").
3868 :     The rationale is that a library's internal workings should not be
3869 :     compromised by the lack of some anchor. (An anchor is necessary
3870 :     for someone who wants to refer to the library by an anchored path,
3871 :     but it should not be necessary to build the same library in the first
3872 :     place.)
3873 :    
3874 :     3. I changed the way CM's tool mechanism determines the shell command
3875 :     string used for things like ml-yacc etc. so that it does not break
3876 :     when CM.Control.implicit_anchors is turned off.
3877 :    
3878 :     ----------------------------------------------------------------------
3879 :     Name: Matthias Blume
3880 : blume 644 Date: 2000/05/12 18:20:00 JST
3881 :     Tag: blume-20000512-ml-build
3882 :     Description:
3883 :    
3884 :     Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
3885 :     getting installed properly (by config/install.sh).
3886 :    
3887 :     ----------------------------------------------------------------------
3888 :     Name: Matthias Blume
3889 : blume 643 Date: 2000/05/12 17:30:00 JST
3890 :     Tag: blume-20000512-anchors
3891 :     Description:
3892 :    
3893 :     !!! NEW BOOT FILES !!!
3894 :    
3895 :     This change is in preparation of fading out support for "implicitly
3896 :     anchored path names". I went through all sources and used the
3897 :     explicit (and relatively new) $-notation. See system/README and the
3898 :     CM manual for more info on this.
3899 :    
3900 :     I also modified the anchoring scheme for some things such as "smlnj",
3901 :     "MLRISC", "cm", etc. to take advantage of the fact that explicit
3902 :     anchors are more expressive: anchor name and first arc do not have to
3903 :     coincide. This entails the following user-visible change:
3904 :    
3905 :     You have to write $smlnj/foo/bar instead of smlnj/foo/bar. In
3906 :     particular, when you fire up sml with a command-line argument, say,
3907 :     e.g.:
3908 :    
3909 :     sml '$smlnj/cmb.cm'
3910 :    
3911 :     At the ML toplevel prompt:
3912 :    
3913 :     CM.autoload "$smlnj/cmb.cm";
3914 :    
3915 :     There is also a new controller in CM.Control that can be used to turn
3916 :     off all remaining support for implicit anchors by saying:
3917 :    
3918 :     CM.autoload "$smlnj/
3919 :     #set CM.Control.implicit_anchors false;
3920 :    
3921 :     This causes CM to reject implicitly anchored paths. This is (for the
3922 :     time being) less permissive than the "final" version where there will
3923 :     be no more such implicit anchors and relative paths will be just that:
3924 :     relative.
3925 :    
3926 :     The next step (version after next version?) will be to make the
3927 :     default for CM.Control.implicit_anchors false. After the dust has
3928 :     settled, I can then produce the "final" version of this...
3929 :    
3930 :     Note: Since bootstrapping is a bit tricky, I provided new boot files.
3931 :    
3932 :     ----------------------------------------------------------------------
3933 :     Name: Matthias Blume
3934 : blume 642 Date: 2000/05/11 16:30:00 JST
3935 :     Tag: blume-20000511-sources
3936 :     Description:
3937 :    
3938 :     The main change is that I added function CM.sources as a generalized
3939 :     version of the earlier CM.makedepend. This entails the following
3940 :     additional changes:
3941 :    
3942 :     - CM.makedepend has been dropped.
3943 :    
3944 :     - CM manual has been updated.
3945 :    
3946 :     - TOOLS signature and API have been changed.
3947 :    
3948 :     ----------------------------------------------------------------------
3949 : leunga 640 Name: Allen Leung
3950 : leunga 641 Date: 2000/05/10 21:17 EDT
3951 :     Tag: leunga-20000510-moby-c--ssa
3952 :     Description:
3953 :    
3954 :     Various bug fixes and new features for C--, Moby and MLRISC optimizations.
3955 :     None of these affect SML/NJ.
3956 :    
3957 :     1. Register Allocation
3958 :    
3959 :     a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
3960 :     This module tries to remove local (i.e. basic block level) redundancies
3961 :     during spilling.
3962 :    
3963 :     b. A new framework for performing region based register allocation.
3964 :     Not yet entirely functional.
3965 :    
3966 :     2. X86
3967 :    
3968 :     a. DefUse for POP was missing the stack pointer [found by Lal]
3969 :     b. Reload for CALL was incorrect in X86Spill [found by John]
3970 :     c. Various fixes in X86Spill so that it can be used correctly for
3971 :     the new spilling module.
3972 :    
3973 :     3. SSA/IR
3974 :    
3975 :     a. New module ir/dj-dataflow.sml implements elimination based
3976 :     data flow analysis.
3977 :    
3978 :     4. MLRiscGen
3979 :    
3980 :     a. Fix for gc type annotation
3981 :    
3982 :     5. MDGen
3983 :    
3984 :     Various fixes for machine description -> ml code translation. For ssa
3985 :     only.
3986 :    
3987 :     ----------------------------------------------------------------------
3988 :     Name: Allen Leung
3989 : leunga 640 Date: 2000/05/08 22:17 EDT
3990 :     Tag: leunga-20000508-labexp
3991 :     Description:
3992 :    
3993 :     Fermin has found a few assembly problems with constant expressions
3994 :     generated in LabelExp. Mostly, the problems involve extra parentheses,
3995 :     which choke on dumb assemblers. This is his fix.
3996 :    
3997 :     ----------------------------------------------------------------------
3998 : dbm 635 Name: Dave MacQueen
3999 :     Date: 2000/04/09 14:00 EDT
4000 :     Tag: dbm-20000502-Version_110_28
4001 :     Description:
4002 :    
4003 :     1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
4004 :    
4005 :     2. Updated config/version to 110.28
4006 :    
4007 :     3. Updated config/srcarchiveurl
4008 :    
4009 :     3. New boot files!
4010 :     ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
4011 :    
4012 :     ----------------------------------------------------------------------
4013 : blume 634 Name: Matthias Blume
4014 :     Date: 2000/05/01 19:05:00 JST
4015 :     Tag: blume-20000501-noweb
4016 :     Description:
4017 :    
4018 :     A new noweb tool has been added. The existing system is entirely
4019 :     unaffected by this, but some CM users have asked for renewed noweb
4020 :     support. Everything is documented in the CM manual.
4021 :    
4022 :     New (plugin) libraries:
4023 :    
4024 :     noweb-tool.cm
4025 :     nw-ext.cm
4026 :    
4027 :     ----------------------------------------------------------------------
4028 : dbm 633 Name: Dave MacQueen
4029 :     Date: 2000/04/30 12:40PM EDT
4030 :     Tag: dbm-20000430-bug_fixes
4031 :     Description:
4032 :    
4033 :     1. Fix for bug 1498
4034 :     smlnj/src/system/Basis/Implementation/Unsafe/object.sig
4035 :     smlnj/src/system/Basis/Implementation/Unsafe/object.sml
4036 :     added toRealArray function
4037 :     smlnj/src/compiler/MiscUtil/print/ppobj.sml
4038 :     added check for tag Obj.RealArray to array printing case in ppObj
4039 :    
4040 :     2. Fix for bug 1510
4041 :     smlnj/src/compiler/Semant/types/typesutil.sml
4042 :     fixed definition of dummyargs (used by equalTycon) so that
4043 :     dummy args are distinct types
4044 :    
4045 :     ----------------------------------------------------------------------
4046 : blume 629 Name: Matthias Blume
4047 : blume 632 Date: 2000/04/30 01:00:00 JST
4048 :     Tag: blume-20000430-versions
4049 :     Description:
4050 :    
4051 :     1. CM version numbering added. This is an implementation of Lal's
4052 :     proposal for adding version numbers and version checking to .cm
4053 :     files. Lal said that his proposal was just that -- a proposal.
4054 :     For the time being I went ahead and implemented it so that people
4055 :     can comment on it. Everything is completely backward-compatible
4056 :     (except for the stable library format, i.e., new bootfiles!).
4057 :    
4058 :     As usual, see the CM manual for details.
4059 :    
4060 :     2. An alternative syntax for anchored paths has been implemented.
4061 :     Dave has recently voiced the same concerns that I had when I did
4062 :     this, so there should be some support. My take is that eventually
4063 :     I will let support for the current syntax (where anchors are
4064 :     "implicit") fade out in favor of the new, explicit syntax.
4065 :     In order to be backward-compatible, both old and new syntax are
4066 :     currently supported.
4067 :    
4068 :     Again, see the CM manual for details.
4069 :    
4070 :     3. Parallel make is trying to be slightly smarter: When the master
4071 :     process finds a "bottleneck", i.e., when there is only one
4072 :     compilation unit that can be compiled and everybody else is
4073 :     waiting on it, then it will simply compile it directly instead
4074 :     of clumsily telling one of the slaves to do it.
4075 :    
4076 :     4. Support for "unsharing" added. This is necessary in order to be
4077 :     able to have two different versions of the same library running
4078 :     at the same time (e.g., for trying out a new MLRISC while still
4079 :     having the old MLRISC linked into the current compiler, etc.)
4080 :     See the CM manual.
4081 :    
4082 :     5. Simple "makedepend" functionality added for generating Makefile
4083 :     dependency information. (This is rather crude at the moment.
4084 :     Expect some changes here in the future.)
4085 :    
4086 :     6. ".fun" added as a recognized suffix for ML files. Also documented
4087 :     explicitly in the manual that the fallback behavior (unknown suffix
4088 :     -> ML file) is not an official feature!
4089 :    
4090 :     7. Small changes to the pickler for stable libraries.
4091 :    
4092 :     8. Several internal changes to CM (for cleanup/improvement).
4093 :    
4094 :    
4095 :     !!!! NEW BINFILES !!!!
4096 :    
4097 :     ----------------------------------------------------------------------
4098 :     Name: Matthias Blume
4099 : blume 631 Date: 2000/04/28 17:30:00 JST
4100 :     Tag: blume-20000428-pathconfig
4101 :     Description:
4102 :    
4103 :     1. I changed config/install.sh to remove duplicate entries from the
4104 :     lib/pathconfig file at the end. Moreover, the final version of
4105 :     lib/pathconfig is sorted alphabetically. The same (sorting) is done
4106 :     in src/system/installml.
4107 :    
4108 :     2. The config/install.sh script now consistently uses relative
4109 :     pathnames in lib/pathconfig whenever the anchor is in the lib
4110 :     directory. (So far this was true for the libraries that come
4111 :     pre-compiled and bundled as part of the bootfiles but not for
4112 :     libraries that are compiled by the script itself.)
4113 :    
4114 :     ----------------------------------------------------------------------
4115 :     Name: Matthias Blume
4116 : blume 629 Date: 2000/04/26 13:10:00 JST
4117 :     Tag: blume-20000426-fun_suffix
4118 :     Description:
4119 :    
4120 :     Added ".fun" as a recognized file name suffix (for ML code).
4121 :    
4122 :     ----------------------------------------------------------------------
4123 : leunga 628 Name: Allen Leung
4124 :     Date: 2000/04/25 17:00:00 EST
4125 :     Tag: leunga-20000425-alpha-ra
4126 :     Description:
4127 :    
4128 :     1. Alpha
4129 :    
4130 :     PSEUDOARITH was missing in AlphaRewrite. This causes an endless loop
4131 :     in C--.
4132 :    
4133 :     2. RA
4134 :    
4135 :     Added a flag "ra-dump-size" to print out the size of the flowgraph
4136 :     and the interference graph.
4137 :    
4138 :     ----------------------------------------------------------------------
4139 : dbm 627 Name: Dave MacQueen
4140 :     Date: 2000/04/25/
4141 :     Tag: dbm-20000425-mlyacc_doc_examples
4142 :     Description:
4143 :     Updated mlyacc.tex sections 5 and 7 for SML '97 and CM.
4144 :     Updated all three examples in src/ml-yacc/examples to run
4145 :     under 110.* using CM.make.
4146 :    
4147 :     ----------------------------------------------------------------------
4148 : leunga 624 Name: Allen Leung
4149 :     Date: 2000/04/20 23:04:00 EST
4150 :     Tag: leunga-20000420-ssa-c---stuff
4151 :     Description:
4152 :    
4153 :     This update synchronizes my repository with Yale's. Most of these
4154 :     changes, however, do not affect SML/NJ at all (the RA is an exception).
4155 :    
4156 :     1. Register Allocator
4157 :    
4158 :     a. An improvement in the interference graph construction:
4159 :     Given a copy
4160 :    
4161 :     s <- t
4162 :    
4163 : leunga 628 no interference edge between s and t is added for this definition of s.
4164 : leunga 624
4165 :     b. I've added two new spill heuristic modules that Fermin and I developed
4166 :     (in the new library RA.cm). These are unused in SML/NJ but maybe
4167 :     useful for others (Moby?)
4168 :    
4169 :     2. X86
4170 :    
4171 :     a. Various fixes in the backend provided by Fermin [C--] and Lal.
4172 :    
4173 :     3. Alpha
4174 :    
4175 :     a. Added the BSR instruction and code generation that goes with it [C--]
4176 :     b. Other fixes too numerous to recount provided by Fermin [C--]
4177 :    
4178 :     4. Regmaps
4179 :    
4180 :     a. The regmaps are not initialized with the identity physical bindings
4181 :     at creation time. This is unneeded.
4182 :    
4183 :     5. MLRISC Optimizations
4184 :    
4185 :     a. The DJ-Graph module can now compute the iterated dominance frontiers
4186 :     intersects with liveness incrementally in linear time! Woohoo!
4187 :     This is now used in my new SSA construction algorithm.
4188 :    
4189 :     b. THe branch reorganization module is now smarter about linear chains of
4190 :     basic blocks.
4191 :    
4192 :    
4193 :     ----------------------------------------------------------------------
4194 : blume 615 Name: Matthias Blume
4195 :     Date: 2000/04/12 13:52:00 JST
4196 :     Tag: blume_main_v110p27_1
4197 :     Description:
4198 :    
4199 :     Changed install.sh script to handle archive files without version number
4200 :     and to use "boot.<arch>-<os>" instead of "sml.boot.<arch>-<os>" for the
4201 :     name of the boot file archive.
4202 :    
4203 :     ----------------------------------------------------------------------
4204 : dbm 607 Name: Dave MacQueen
4205 :     Date: 2000/04/09 14:00 EDT
4206 :     Tag: dbm-20000410-Version_110_27
4207 :     Description:
4208 :    
4209 :     1. Updated src/compiler/TopLevel/main/version.sml to version 110.27
4210 :    
4211 :     2. Updated src/config/version to 110.27
4212 :    
4213 :     3. New boot files!
4214 :    
4215 :     ----------------------------------------------------------------------
4216 : leunga 606 Name: Allen Leung
4217 :     Date: 2000/04/09 19:09:00 EST
4218 :     Tag: leunga-20000409-misc
4219 :     Description:
4220 :    
4221 :     1. Yet another fix for x86 assembly for idivl, imull, mull and friends.
4222 :    
4223 :     2. Miscellaneous improvements to MLRISC (unused in sml/nj)
4224 :    
4225 :     ----------------------------------------------------------------------
4226 : monnier 605 Name: Stefan
4227 :     Date: 2000/04/07 10:00:00 EDT
4228 :     Tag: monnier-20000406-branch-handling
4229 :     Description:
4230 :    
4231 :     Improved handling of branches (mostly those generated from
4232 :     polymorphic equality), removed switchoff and changed the
4233 :     default optimization settings (more cpsopt and less flintopt).
4234 :    
4235 :     ----------------------------------------------------------------------
4236 : leunga 601 Name: Allen Leung
4237 : leunga 602 Date: 2000/04/06 01:30:00 EST
4238 :     Tag: leunga-20000406-peephole-x86-SSA-2
4239 :     Description:
4240 :    
4241 :     Forgot a few files.
4242 :    
4243 :     ----------------------------------------------------------------------
4244 :     Name: Allen Leung
4245 : leunga 601 Date: 2000/04/06 00:36:00 EST
4246 :     Tag: leunga-20000406-peephole-x86-SSA
4247 :     Description:
4248 :    
4249 :     1. New Peephole code
4250 :    
4251 :     2. Minor improvement to X86 instruction selection
4252 :    
4253 :     3. Various fixes to SSA and machine description -> code translator
4254 :    
4255 :     ----------------------------------------------------------------------
4256 : blume 595 Name: Matthias Blume
4257 :     Date: 2000/04/05 12:30:00 JST
4258 :     Tag: blume_main_v110p26p2_3
4259 :     Description:
4260 :    
4261 :     This update just merges three minor cosmetic updates to CM's sources
4262 :     to get ready for the 110.27 code freeze on Friday. No functionality
4263 :     has changed.
4264 :    
4265 :     ----------------------------------------------------------------------
4266 : leunga 593 Name: Allen Leung
4267 : leunga 594 Date: 2000/04/04 19:39:00 EST
4268 :     Tag: leunga-20000404-x86-asm
4269 :     Description:
4270 :    
4271 :     1. Fixed a problem in X86 assembly.
4272 :    
4273 :     Things like
4274 :    
4275 :     jmp %eax
4276 :     jmp (%eax)
4277 :    
4278 :     should be output as
4279 :    
4280 :     jmp *%eax
4281 :     jmp *(%eax)
4282 :    
4283 :     2. Assembly output
4284 :    
4285 :     Added a new flag
4286 :    
4287 :     "asm-indent-copies" (default to false)
4288 :    
4289 :     When this flag is on, parallel copies will be indented an extra level.
4290 :    
4291 :     ----------------------------------------------------------------------
4292 :     Name: Allen Leung
4293 : leunga 593 Date: 2000/04/04 03:18:00 EST
4294 :     Tag: leunga-20000404-C--Moby
4295 :     Description:
4296 :    
4297 :     All of these fixes are related to C--, Moby, and my own optimization
4298 :     stuff; so they shouldn't affect SML/NJ.
4299 :    
4300 :     1. X86
4301 :    
4302 :     Various fixes related floating point, and extensions.
4303 :    
4304 :     2. Alpha
4305 :    
4306 :     Some extra patterns related to loads with signed/zero extension
4307 :     provided by Fermin.
4308 :    
4309 :     3. Assembly
4310 :    
4311 : monnier 659 When generating assembly, resolve the value of client defined constants,
4312 : leunga 593 instead of generating symbolic values. This is controlled by the
4313 :     new flag "asm-resolve-constants", which is default to true.
4314 :    
4315 :     4. Machine Descriptions
4316 :    
4317 :     a. The precedence parser was slightly broken when parsing infixr symbols.
4318 :     b. The type generalizing code had the bound variables reversed, resulting
4319 :     in a problem during arity raising.
4320 :     c. Various fixes in machine descriptions.
4321 :    
4322 :     ----------------------------------------------------------------------
4323 : blume 592 Name: Matthias Blume
4324 :     Date: 2000/04/03 16:05:00 JST
4325 :     Tag: blume_main_v110p26p2_2
4326 :     Description:
4327 :    
4328 :     I eliminated coreEnv from compInfo. Access to the "Core" structure is
4329 :     now done via the ordinary static environment that is context to each
4330 :     compilation unit.
4331 :    
4332 :     To this end, I arranged that instead of "structure Core" as "structure
4333 :     _Core" is bound in the pervasive environment. Core access is done via
4334 : monnier 659 _Core (which can never be accidentally rebound because _Core is not a
4335 : blume 592 legal surface-syntax symbol).
4336 :    
4337 :     The current solution is much cleaner because the core environment is
4338 :