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[smlnj] Annotation of /sml/trunk/HISTORY
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Annotation of /sml/trunk/HISTORY

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1 : dbm 570 This is the HISTORY file for the Yale SML/NJ CVS repository.
2 :    
3 :     An entry should be made for _every_ commit to the repository.
4 :     The entries in this file will be used when creating the README
5 :     for new versions, so keep that in mind when writing the
6 :     description.
7 :    
8 :     The form of an entry should be:
9 :    
10 :     Name:
11 : george 1003 Date: yyyy/mm/dd
12 : dbm 570 Tag: <post-commit CVS tag>
13 :     Description:
14 : george 1136 ----------------------------------------------------------------------
15 : blume 1137 Name: Matthias Blume
16 : blume 1140 Date: 2002/03/13 14:00:00 EST
17 :     Tag: blume-20020313-overload-etc
18 :     Description:
19 :    
20 :     1. Added _overload as a synonym for overload for backward compatibility.
21 :     (Control.overloadKW must be true for either version to be accepted.)
22 :    
23 :     2. Fixed bug in install script that caused more things to be installed
24 :     than what was requested in config/targets.
25 :    
26 :     3. Made CM aware of the (_)overload construct so that autoloading
27 :     works.
28 :    
29 :     ----------------------------------------------------------------------
30 :     Name: Matthias Blume
31 : blume 1138 Date: 2002/03/12 22:03:00 EST
32 :     Tag: blume-20020312-url
33 :     Description:
34 :    
35 :     Forgot to update BOOT and srcarchiveurl.
36 :    
37 :     ----------------------------------------------------------------------
38 :     Name: Matthias Blume
39 : blume 1137 Date: 2002/03/12 17:30:00 EST
40 :     Tag: blume-20020312-version110392
41 :     Description:
42 :    
43 :     Yet another version number bump (because of small changes to the
44 :     binfile format). Version number is now 110.39.2. NEW BOOTFILES!
45 :    
46 :     Changes:
47 :    
48 :     The new pid generation scheme described a few weeks ago was overly
49 :     complicated. I implemented a new mechanism that is simpler and
50 :     provides a bit more "stability": Once CM has seen a compilation
51 :     unit, it keeps its identity constant (as long as you do not delete
52 :     those crucial CM/GUID/* files). This means that when you change
53 :     and interface, compiler, then go back to the old interface, and
54 :     compile again, you arrive at the original pid.
55 :    
56 :     There now also is a mechanism that instructs CM to use the plain
57 :     environment hash as a module's pid (effectively making its GUID
58 :     the empty string). For this, "noguid" must be specified as an
59 :     option to the .sml file in question within its .cm file.
60 :     This is most useful for code that is being generated by tools such
61 :     as ml-nlffigen (because during development programmers tend to
62 :     erase the tool's entire output directory tree including CM's cached
63 :     GUIDs). "noguid" is somewhat dangerous (since it can be used to locally
64 :     revert to the old, broken behavior of SML/NJ, but in specific cases
65 :     where there is no danger of interface confusion, its use is ok
66 :     (I think).
67 :    
68 :     ml-nlffigen by default generates "noguid" annotations. They can be
69 :     turned off by specifying -guid in its command line.
70 :    
71 :     ----------------------------------------------------------------------
72 : george 1136 Name: Lal George
73 :     Date: 2002/03/12 12 14:42:36 EST
74 :     Tag: george-20020312-frequency-computation
75 :     Description:
76 :    
77 :     Integrated jump chaining and static block frequency into the
78 :     compiler. More details and numbers later.
79 : leunga 1025
80 : george 1003 ----------------------------------------------------------------------
81 : george 1133 Name: Lal George
82 :     Date: 2002/03/11 11 22:38:53 EST
83 :     Tag: george-20020311-jump-chain-elim
84 :     Description:
85 :    
86 :     Tested the jump chain elimination on all architectures (except the
87 :     hppa). This is on by default right now and is profitable for the
88 :     alpha and x86, however, it may not be profitable for the sparc and ppc
89 :     when compiling the compiler.
90 :    
91 :     The gc test will typically jump to a label at the end of the cluster,
92 :     where there is another jump to an external cluster containing the actual
93 :     code to invoke gc. This is to allow factoring of common gc invocation
94 :     sequences. That is to say, we generate:
95 :    
96 :     f:
97 :     testgc
98 :     ja L1 % jump if above to L1
99 :    
100 :     L1:
101 :     jmp L2
102 :    
103 :    
104 :     After jump chain elimination the 'ja L1' instructions is converted to
105 :     'ja L2'. On the sparc and ppc, many of the 'ja L2' instructions may end
106 :     up being implemented in their long form (if L2 is far away) using:
107 :    
108 :     jbe L3 % jump if below or equal to L3
109 :     jmp L2
110 :     L3:
111 :     ...
112 :    
113 :    
114 :     For large compilation units L2 may be far away.
115 :    
116 :    
117 :     ----------------------------------------------------------------------
118 : blume 1132 Name: Matthias Blume
119 :     Date: 2002/03/11 13:30:00 EST
120 :     Tag: blume-20020311-mltreeeval
121 :     Description:
122 :    
123 :     A functor parameter was missing.
124 :    
125 :     ----------------------------------------------------------------------
126 : leunga 1130 Name: Allen Leung
127 : leunga 1131 Date: 2002/03/11 10:30:00 EST
128 :     Tag: leunga-20020310-runtime-string0
129 :     Description:
130 :    
131 :     The representation of the empty string now points to a
132 :     legal null terminated C string instead of unit. It is now possible
133 :     to convert an ML string into C string with InlineT.CharVector.getData.
134 :     This compiles into one single machine instruction.
135 :    
136 :     ----------------------------------------------------------------------
137 :     Name: Allen Leung
138 : leunga 1130 Date: 2002/03/10 23:55:00 EST
139 :     Tag: leunga-20020310-x86-call
140 :     Description:
141 :    
142 :     Added machine generation for CALL instruction (relative displacement mode)
143 :    
144 :     ----------------------------------------------------------------------
145 : blume 1128 Name: Matthias Blume
146 :     Date: 2002/03/08 16:05:00
147 :     Tag: blume-20020308-entrypoints
148 :     Description:
149 :    
150 :     Version number bumped to 110.39.1. NEW BOOTFILES!
151 :    
152 :     Entrypoints: non-zero offset into a code object where execution should begin.
153 :    
154 :     - Added the notion of an entrypoint to CodeObj.
155 :     - Added reading/writing of entrypoint info to Binfile.
156 :     - Made runtime system bootloader aware of entrypoints.
157 :     - Use the address of the label of the first function given to mlriscGen
158 :     as the entrypoint. This address is currently always 0, but it will
159 :     not be 0 once we turn on block placement.
160 :     - Removed the linkage cluster code (which was The Other Way(tm) of dealing
161 :     with entry points) from mlriscGen.
162 :    
163 :     ----------------------------------------------------------------------
164 : leunga 1127 Name: Allen Leung
165 :     Date: 2002/03/07 20:45:00 EST
166 :     Tag: leunga-20020307-x86-cmov
167 :     Description:
168 :    
169 :     Bug fixes for CMOVcc on x86.
170 :    
171 :     1. Added machine code generation for CMOVcc
172 :     2. CMOVcc is now generated in preference over SETcc on PentiumPro or above.
173 :     3. CMOVcc cannot have an immediate operand as argument.
174 :    
175 :     ----------------------------------------------------------------------
176 : blume 1126 Name: Matthias Blume
177 :     Date: 2002/03/07 16:15:00 EST
178 :     Tag: blume-20020307-controls
179 :     Description:
180 :    
181 :     This is a very large but mostly boring patch which makes (almost)
182 :     every tuneable compiler knob (i.e., pretty much everything under
183 :     Control.* plus a few other things) configurable via both the command
184 :     line and environment variables in the style CM did its configuration
185 :     until now.
186 :    
187 :     Try starting sml with '-h' (or, if you are brave, '-H')
188 :    
189 :     To this end, I added a structure Controls : CONTROLS to smlnj-lib.cm which
190 :     implements the underlying generic mechanism.
191 :    
192 :     The interface to some of the existing such facilities has changed somewhat.
193 :     For example, the MLRiscControl module now provides mkFoo instead of getFoo.
194 :     (The getFoo interface is still there for backward-compatibility, but its
195 :     use is deprecated.)
196 :    
197 :     The ml-build script passes -Cxxx=yyy command-line arguments through so
198 :     that one can now twiddle the compiler settings when using this "batch"
199 :     compiler.
200 :    
201 :     TODO items:
202 :    
203 :     We should go through and throw out all controls that are no longer
204 :     connected to anything. Moreover, we should go through and provide
205 :     meaningful (and correct!) documentation strings for those controls
206 :     that still are connected.
207 :    
208 :     Currently, multiple calls to Controls.new are accepted (only the first
209 :     has any effect). Eventually we should make sure that every control
210 :     is being made (via Controls.new) exactly once. Future access can then
211 :     be done using Controls.acc.
212 :    
213 :     Finally, it would probably be a good idea to use the getter-setter
214 :     interface to controls rather than ref cells. For the time being, both
215 :     styles are provided by the Controls module, but getter-setter pairs are
216 :     better if thread-safety is of any concern because they can be wrapped.
217 :    
218 :     *****************************************
219 :    
220 :     One bug fix: The function blockPlacement in three of the MLRISC
221 :     backpatch files used to be hard-wired to one of two possibilities at
222 :     link time (according to the value of the placementFlag). But (I
223 :     think) it should rather sense the flag every time.
224 :    
225 :     *****************************************
226 :    
227 :     Other assorted changes (by other people who did not supply a HISTORY entry):
228 :    
229 :     1. the cross-module inliner now works much better (Monnier)
230 :     2. representation of weights, frequencies, and probabilities in MLRISC
231 :     changed in preparation of using those for weighted block placement
232 :     (Reppy, George)
233 :    
234 :     ----------------------------------------------------------------------
235 : george 1116 Name: Lal George
236 : george 1124 Date: 2002/03/07 14:44:24 EST 2002
237 :     Tag: george-20020307-weighted-block-placement
238 :    
239 :     Tested the weighted block placement optimization on all architectures
240 :     (except the hppa) using AMPL to generate the block and edge frequencies.
241 :     Changes were required in the machine properties to correctly
242 :     categorize trap instructions. There is an MLRISC flag
243 :     "weighted-block-placement" that can be used to enable weighted block
244 :     placement, but this will be ineffective without block/edge
245 :     frequencies (coming soon).
246 :    
247 :    
248 :     ----------------------------------------------------------------------
249 :     Name: Lal George
250 : george 1116 Date: 2002/03/05 17:24:48 EST
251 :     Tag: george-20020305-linkage-cluster
252 :    
253 : george 1124 In order to support the block placement optimization, a new cluster
254 :     is generated as the very first cluster (called the linkage cluster).
255 :     It contains a single jump to the 'real' entry point for the compilation
256 :     unit. Block placement has no effect on the linkage cluster itself, but
257 :     all the other clusters have full freedom in the manner in which they
258 :     reorder blocks or functions.
259 : george 1116
260 :     On the x86 the typical linkage code that is generated is:
261 :     ----------------------
262 :     .align 2
263 :     L0:
264 :     addl $L1-L0, 72(%esp)
265 : george 1124 jmp L1
266 : george 1116
267 :    
268 :     .align 2
269 :     L1:
270 :     ----------------------
271 :    
272 :     72(%esp) is the memory location for the stdlink register. This
273 :     must contain the address of the CPS function being called. In the
274 : george 1124 above example, it contains the address of L0; before
275 : george 1116 calling L1 (the real entry point for the compilation unit), it
276 :     must contain the address for L1, and hence
277 :    
278 :     addl $L1-L0, 72(%esp)
279 :    
280 : george 1124 I have tested this on all architectures except the hppa.The increase
281 :     in code size is of course negligible
282 : george 1116
283 :     ----------------------------------------------------------------------
284 : leunga 1115 Name: Allen Leung
285 :     Date: 2002/03/03 13:20:00 EST
286 :     Tag: leunga-20020303-mlrisc-tools
287 :    
288 :     Added #[ ... ] expressions to mlrisc tools
289 :    
290 :     ----------------------------------------------------------------------
291 : blume 1096 Name: Matthias Blume
292 : blume 1098 Date: 2002/02/27 12:29:00 EST
293 :     Tag: blume-20020227-cdebug
294 :     Description:
295 :    
296 :     - made types in structure C and C_Debug to be equal
297 :     - got rid of code duplication (c-int.sml vs. c-int-debug.sml)
298 :     - there no longer is a C_Int_Debug (C_Debug is directly derived from C)
299 :    
300 :     ----------------------------------------------------------------------
301 :     Name: Matthias Blume
302 : blume 1096 Date: 2002/02/26 12:00:00 EST
303 :     Tag: blume-20020226-ffi
304 :     Description:
305 :    
306 :     1. Fixed a minor bug in CM's "noweb" tool:
307 :     If numbering is turned off, then truly don't number (i.e., do not
308 :     supply the -L option to noweb). The previous behavior was to supply
309 :     -L'' -- which caused noweb to use the "default" line numbering scheme.
310 :     Thanks to Chris Richards for pointing this out (and supplying the fix).
311 :    
312 :     2. Once again, I reworked some aspects of the FFI:
313 :    
314 :     A. The incomplete/complete type business:
315 :    
316 :     - Signatures POINTER_TO_INCOMPLETE_TYPE and accompanying functors are
317 :     gone!
318 :     - ML types representing an incomplete type are now *equal* to
319 :     ML types representing their corresponding complete types (just like
320 :     in C). This is still safe because ml-nlffigen will not generate
321 :     RTTI for incomplete types, nor will it generate functions that
322 :     require access to such RTTI. But when ML code generated from both
323 :     incomplete and complete versions of the C type meet, the ML types
324 :     are trivially interoperable.
325 :    
326 :     NOTE: These changes restore the full generality of the translation
327 :     (which was previously lost when I eliminated functorization)!
328 :    
329 :     B. Enum types:
330 :    
331 :     - Structure C now has a type constructor "enum" that is similar to
332 :     how the "su" constructor works. However, "enum" is not a phantom
333 :     type because each "T enum" has values (and is isomorphic to
334 :     MLRep.Signed.int).
335 :     - There are generic access operations for enum objects (using
336 :     MLRep.Signed.int).
337 :     - ml-nlffigen will generate a structure E_foo for each "enum foo".
338 :     * The structure contains the definition of type "mlrep" (the ML-side
339 :     representation type of the enum). Normally, mlrep is the same
340 :     as "MLRep.Signed.int", but if ml-nlffigen was invoked with "-ec",
341 :     then mlrep will be defined as a datatype -- thus facilitating
342 :     pattern matching on mlrep values.
343 :     ("-ec" will be suppressed if there are duplicate values in an
344 :     enumeration.)
345 :     * Constructors ("-ec") or values (no "-ec") e_xxx of type mlrep
346 :     will be generated for each C enum constant xxx.
347 :     * Conversion functions m2i and i2m convert between mlrep and
348 :     MLRep.Signed.int. (Without "-ec", these functions are identities.)
349 :     * Coversion functions c and ml convert between mlrep and "tag enum".
350 :     * Access functions (get/set) fetch and store mlrep values.
351 :     - By default (unless ml-nlffigen was invoked with "-nocollect"), unnamed
352 :     enumerations are merged into one single enumeration represented by
353 :     structure E_'.
354 :    
355 :     ----------------------------------------------------------------------
356 : leunga 1080 Name: Allen Leung
357 : leunga 1094 Date: 2002/02/25 04:45:00 EST
358 :     Tag: leunga-20020225-cps-spill
359 :    
360 :     This is a new implementation of the CPS spill phase.
361 :     The new phase is in the new file compiler/CodeGen/cpscompile/spill-new.sml
362 :     In case of problems, replace it with the old file spill.sml
363 :    
364 :     The current compiler runs into some serious performance problems when
365 :     constructing a large record. This can happen when we try to compile a
366 :     structure with many items. Even a very simple structure like the following
367 :     makes the compiler slow down.
368 :    
369 :     structure Foo = struct
370 :     val x_1 = 0w1 : Word32.int
371 :     val x_2 = 0w2 : Word32.int
372 :     val x_3 = 0w3 : Word32.int
373 :     ...
374 :     val x_N = 0wN : Word32.int
375 :     end
376 :    
377 :     The following table shows the compile time, from N=1000 to N=4000,
378 :     with the old compiler:
379 :    
380 :     N
381 :     1000 CPS 100 spill 0.04u 0.00s 0.00g
382 :     MLRISC ra 0.06u 0.00s 0.05g
383 :     (spills = 0 reloads = 0)
384 :     TOTAL 0.63u 0.07s 0.21g
385 :    
386 :     1100 CPS 100 spill 8.25u 0.32s 0.64g
387 :     MLRISC ra 5.68u 0.59s 3.93g
388 :     (spills = 0 reloads = 0)
389 :     TOTAL 14.71u 0.99s 4.81g
390 :    
391 :     1500 CPS 100 spill 58.55u 2.34s 1.74g
392 :     MLRISC ra 5.54u 0.65s 3.91g
393 :     (spills = 543 reloads = 1082)
394 :     TOTAL 65.40u 3.13s 6.00g
395 :    
396 :     2000 CPS 100 spill 126.69u 4.84s 3.08g
397 :     MLRISC ra 0.80u 0.10s 0.55g
398 :     (spills = 42 reloads = 84)
399 :     TOTAL 129.42u 5.10s 4.13g
400 :    
401 :     3000 CPS 100 spill 675.59u 19.03s 11.64g
402 :     MLRISC ra 2.69u 0.27s 1.38g
403 :     (spills = 62 reloads = 124)
404 :     TOTAL 682.48u 19.61s 13.99g
405 :    
406 :     4000 CPS 100 spill 2362.82u 56.28s 43.60g
407 :     MLRISC ra 4.96u 0.27s 2.72g
408 :     (spills = 85 reloads = 170)
409 :     TOTAL 2375.26u 57.21s 48.00g
410 :    
411 :     As you can see the old cps spill module suffers from some serious
412 : leunga 1115 performance problem. But since I cannot decipher the old code fully,
413 :     instead of patching the problems up, I'm reimplementing it
414 : leunga 1094 with a different algorithm. The new code is more modular,
415 :     smaller when compiled, and substantially faster
416 :     (O(n log n) time and O(n) space). Timing of the new spill module:
417 :    
418 :     4000 CPS 100 spill 0.02u 0.00s 0.00g
419 :     MLRISC ra 0.25u 0.02s 0.15g
420 :     (spills=1 reloads=3)
421 :     TOTAL 7.74u 0.34s 1.62g
422 :    
423 :     Implementation details:
424 :    
425 :     As far as I can tell, the purpose of the CPS spill module is to make sure the
426 :     number of live variables at any program point (the bandwidth)
427 :     does not exceed a certain limit, which is determined by the
428 :     size of the spill area.
429 :    
430 :     When the bandwidth is too large, we decrease the register pressure by
431 :     packing live variables into spill records. How we achieve this is
432 :     completely different than what we did in the old code.
433 :    
434 :     First, there is something about the MLRiscGen code generator
435 :     that we should be aware of:
436 :    
437 :     o MLRiscGen performs code motion!
438 :    
439 :     In particular, it will move floating point computations and
440 :     address computations involving only the heap pointer to
441 :     their use sites (if there is only a single use).
442 :     What this means is that if we have a CPS record construction
443 :     statement
444 :    
445 :     RECORD(k,vl,w,e)
446 :    
447 :     we should never count the new record address w as live if w
448 :     has only one use (which is often the case).
449 :    
450 :     We should do something similar to floating point, but the transformation
451 :     there is much more complex, so I won't deal with that.
452 :    
453 :     Secondly, there are now two new cps primops at our disposal:
454 :    
455 :     1. rawrecord of record_kind option
456 :     This pure operator allocates some uninitialized storage from the heap.
457 :     There are two forms:
458 :    
459 :     rawrecord NONE [INT n] allocates a tagless record of length n
460 :     rawrecord (SOME rk) [INT n] allocates a tagged record of length n
461 :     and initializes the tag.
462 :    
463 :     2. rawupdate of cty
464 :     rawupdate cty (v,i,x)
465 :     Assigns to x to the ith component of record v.
466 :     The storelist is not updated.
467 :    
468 :     We use these new primops for both spilling and increment record construction.
469 :    
470 :     1. Spilling.
471 :    
472 :     This is implemented with a linear scan algorithm (but generalized
473 :     to trees). The algorithm will create a single spill record at the
474 :     beginning of the cps function and use rawupdate to spill to it,
475 :     and SELECT or SELp to reload from it. So both spills and reloads
476 :     are fine-grain operations. In contrast, in the old algorithm
477 :     "spills" have to be bundled together in records.
478 :    
479 :     Ideally, we should sink the spill record construction to where
480 :     it is needed. We can even split the spill record into multiple ones
481 :     at the places where they are needed. But CPS is not a good
482 :     representation for global code motion, so I'll keep it simple and
483 :     am not attempting this.
484 :    
485 :     2. Incremental record construction (aka record splitting).
486 :    
487 :     Long records with many component values which are simulatenously live
488 :     (recall that single use record addresses are not considered to
489 :     be live) are constructed with rawrecord and rawupdate.
490 :     We allocate space on the heap with rawrecord first, then gradually
491 :     fill it in with rawupdate. This is the technique suggested to me
492 :     by Matthias.
493 :    
494 :     Some restrictions on when this is applicable:
495 :     1. It is not a VECTOR record. The code generator currently does not handle
496 :     this case. VECTOR record uses double indirection like arrays.
497 :     2. All the record component values are defined in the same "basic block"
498 :     as the record constructor. This is to prevent speculative
499 :     record construction.
500 :    
501 :     ----------------------------------------------------------------------
502 :     Name: Allen Leung
503 : leunga 1086 Date: 2002/02/22 01:02:00 EST
504 :     Tag: leunga-20020222-mlrisc-tools
505 :    
506 :     Minor bug fixes in the parser and rewriter
507 :    
508 :     ----------------------------------------------------------------------
509 :     Name: Allen Leung
510 : leunga 1085 Date: 2002/02/21 20:20:00 EST
511 :     Tag: leunga-20020221-peephole
512 :    
513 :     Regenerated the peephole files. Some contained typos in the specification
514 :     and some didn't compile because of pretty printing bugs in the old version
515 :     of 'nowhere'.
516 :    
517 :     ----------------------------------------------------------------------
518 :     Name: Allen Leung
519 : leunga 1079 Date: 2002/02/19 20:20:00 EST
520 :     Tag: leunga-20020219-mlrisc-tools
521 :     Description:
522 :    
523 :     Minor bug fixes to the mlrisc-tools library:
524 :    
525 :     1. Fixed up parsing colon suffixed keywords
526 :     2. Added the ability to shut the error messages up
527 :     3. Reimplemented the pretty printer and fixed up/improved
528 :     the pretty printing of handle and -> types.
529 :     4. Fixed up generation of literal symbols in the nowhere tool.
530 :     5. Added some SML keywords to to sml.sty
531 :    
532 :     ----------------------------------------------------------------------
533 :     Name: Matthias Blume
534 : blume 1078 Date: 2002/02/19 16:20:00 EST
535 :     Tag: blume-20020219-cmffi
536 :     Description:
537 :    
538 :     A wild mix of changes, some minor, some major:
539 :    
540 :     * All C FFI-related libraries are now anchored under $c:
541 :     $/c.cm --> $c/c.cm
542 :     $/c-int.cm --> $c/internals/c-int.cm
543 :     $/memory.cm --> $c/memory/memory.cm
544 :    
545 :     * "make" tool (in CM) now treats its argument pathname slightly
546 :     differently:
547 :     1. If the native expansion is an absolute name, then before invoking
548 :     the "make" command on it, CM will apply OS.Path.mkRelative
549 :     (with relativeTo = OS.FileSys.getDir()) to it.
550 :     2. The argument will be passed through to subsequent phases of CM
551 :     processing without "going native". In particular, if the argument
552 :     was an anchored path, then "make" will not lose track of that anchor.
553 :    
554 :     * Compiler backends now "know" their respective C calling conventions
555 :     instead of having to be told about it by ml-nlffigen. This relieves
556 :     ml-nlffigen from one of its burdens.
557 :    
558 :     * The X86Backend has been split into X86CCallBackend and X86StdCallBackend.
559 :    
560 :     * Export C_DEBUG and C_Debug from $c/c.cm.
561 :    
562 :     * C type encoding in ml-nlffi-lib has been improved to model the conceptual
563 :     subtyping relationship between incomplete pointers and their complete
564 :     counterparts. For this, ('t, 'c) ptr has been changed to 'o ptr --
565 :     with the convention of instantiating 'o with ('t, 'c) obj whenever
566 :     the pointer target type is complete. In the incomplete case, 'o
567 :     will be instantiated with some "'c iobj" -- a type obtained by
568 :     using one of the functors PointerToIncompleteType or PointerToCompleteType.
569 :    
570 :     Operations that work on both incomplete and complete pointer types are
571 :     typed as taking an 'o ptr while operations that require the target to
572 :     be known are typed as taking some ('t, 'c) obj ptr.
573 :    
574 :     voidptr is now a bit "more concrete", namely "type voidptr = void ptr'"
575 :     where void is an eqtype without any values. This makes it possible
576 :     to work on voidptr values using functions meant to operate on light
577 :     incomplete pointers.
578 :    
579 :     * As a result of the above, signature POINTER_TO_INCOMPLETE_TYPE has
580 :     been vastly simplified.
581 :    
582 :     ----------------------------------------------------------------------
583 :     Name: Matthias Blume
584 : blume 1076 Date: 2002/02/19 10:48:00 EST
585 :     Tag: blume-20020219-pqfix
586 :     Description:
587 :    
588 :     Applied Chris Okasaki's bug fix for priority queues.
589 :    
590 :     ----------------------------------------------------------------------
591 :     Name: Matthias Blume
592 : blume 1073 Date: 2002/02/15 17:05:00
593 : blume 1069 Tag: Release_110_39
594 :     Description:
595 :    
596 : blume 1073 Last-minute retagging is becoming a tradition... :-(
597 :    
598 :     This is the working release 110.39.
599 :    
600 :     ----------------------------------------------------------------------
601 :     Name: Matthias Blume
602 :     Date: 2002/02/15 16:00:00 EST
603 :     Tag: Release_110_39-orig
604 :     Description:
605 :    
606 : blume 1069 Working release 110.39. New bootfiles.
607 :    
608 : blume 1073 (Update: There was a small bug in the installer so it wouldn't work
609 :     with all shells. So I retagged. -Matthias)
610 :    
611 : blume 1069 ----------------------------------------------------------------------
612 :     Name: Matthias Blume
613 : blume 1068 Date: 2002/02/15 14:17:00 EST
614 :     Tag: blume-20020215-showbindings
615 :     Description:
616 :    
617 :     Added EnvRef.listBoundSymbols and CM.State.showBindings. Especially
618 :     the latter can be useful for exploring what bindings are available at
619 :     the interactive prompt. (The first function returns only the list
620 :     of symbols that are really bound, the second prints those but also the
621 :     ones that CM's autoloading mechanism knows about.)
622 :    
623 :     ----------------------------------------------------------------------
624 :     Name: Matthias Blume
625 : blume 1067 Date: 2002/02/15 12:08:00 EST
626 :     Tag: blume-20020215-iptrs
627 :     Description:
628 :    
629 :     Two improvements to ml-nlffigen:
630 :    
631 :     1. Write files only if they do not exist or if their current contents
632 :     do not coincide with what's being written. (That is, avoid messing
633 :     with the time stamps unless absolutely necessary.)
634 :    
635 :     2. Implement a "repository" mechanism for generated files related
636 :     to "incomplete pointer types". See the README file for details.
637 :    
638 :     ----------------------------------------------------------------------
639 :     Name: Matthias Blume
640 : blume 1066 Date: 2002/02/14 11:50:00 EST
641 :     Tag: blume-20020214-quote
642 :     Description:
643 :    
644 :     Added a type 't t_' to tag.sml (in ml-nlffi-lib.cm). This is required
645 :     because of the new and improved tag generation scheme. (Thanks to Allen
646 :     Leung for pointing it out.)
647 :    
648 :     ----------------------------------------------------------------------
649 : george 1065 Name: Lal George
650 :     Date: 2002/02/14 09:55:27 EST 2002
651 :     Tag: george-20020214-isabelle-bug
652 :     Description:
653 :    
654 :     Fixed the MLRISC bug sent by Markus Wenzel regarding the compilation
655 :     of Isabelle on the x86.
656 :    
657 :     From Allen:
658 :     -----------
659 :     I've found the problem:
660 :    
661 :     in ra-core.sml, I use the counter "blocked" to keep track of the
662 :     true number of elements in the freeze queue. When the counter goes
663 :     to zero, I skip examining the queue. But I've messed up the
664 :     bookkeeping in combine():
665 :    
666 :     else ();
667 :     case !ucol of
668 :     PSEUDO => (if !cntv > 0 then
669 :     (if !cntu > 0 then blocked := !blocked - 1 else ();
670 :     ^^^^^^^^^^^^^^^^^^^^^^^
671 :     moveu := mergeMoveList(!movev, !moveu)
672 :     )
673 :     else ();
674 :    
675 :     combine() is called to coalesce two nodes u and v.
676 :     I think I was thinking that if the move counts of u and v are both
677 :     greater than zero then after they are coalesced then one node is
678 :     removed from the freeze queue. Apparently I was thinking that
679 :     both u and v are of low degree, but that's clearly not necessarily true.
680 :    
681 :    
682 :     02/12/2002:
683 :     Here's the patch. HOL now compiles.
684 :    
685 :     I don't know how this impact on performance (compile
686 :     time or runtime). This bug caused the RA (especially on the x86)
687 :     to go thru the potential spill phase when there are still nodes on the
688 :     freeze queue.
689 :    
690 :    
691 :    
692 :    
693 :     ----------------------------------------------------------------------
694 : blume 1058 Name: Matthias Blume
695 : blume 1064 Date: 2002/02/13 22:40:00 EST
696 :     Tag: blume-20020213-fptr-rtti
697 :     Description:
698 :    
699 :     Fixed a bug in ml-nlffigen that was introduced with one of the previous
700 :     updates.
701 :    
702 :     ----------------------------------------------------------------------
703 :     Name: Matthias Blume
704 : blume 1063 Date: 2002/02/13 16:41:00 EST
705 :     Tag: blume-20020213-cmlpq
706 :     Description:
707 :    
708 :     Added new priority queue export symbols (which have just been added to
709 :     smlnj-lib.cm) to CML's version of smlnj-lib.cm. (Otherwise CML would
710 :     not compile and the installer would choke.)
711 :    
712 :     ----------------------------------------------------------------------
713 :     Name: Matthias Blume
714 : blume 1062 Date: 2002/02/13 16:15:00 EST
715 :     Tag: blume-20020213-various
716 :     Description:
717 :    
718 :     1. More tweaks to ml-nlffigen:
719 :    
720 :     - better internal datastructures (resulting in slight speedup)
721 :     - "-match" option requires exact match
722 :     - "localized" gensym counters (untagged structs/unions nested within
723 :     other structs/unions or within typedefs get a fresh counter; their
724 :     tag will be prefixed by a concatenation of their parents' tags)
725 :     - bug fixes (related to calculation of transitive closure of types
726 :     to be included in the output)
727 :    
728 :     2. Minor Basis updates:
729 :    
730 :     - added implementations for List.collate and Option.app
731 :    
732 :     ----------------------------------------------------------------------
733 :     Name: Matthias Blume
734 : blume 1060 Date: 2002/02/11 15:55:00 EST
735 :     Tag: blume-20020211-gensym
736 :     Description:
737 :    
738 :     Added a "-gensym" option to command line of ml-nlffigen. This can be
739 :     used to specify a "stem" -- a string that is inserted in all "gensym'd"
740 :     names (ML structure names that correspond to unnamed C structs, unions,
741 :     and enums), so that separate runs of ml-nlffigen do not clash.
742 :    
743 :     ----------------------------------------------------------------------
744 :     Name: Matthias Blume
745 : blume 1059 Date: 2002/02/11 12:05:00 EST
746 :     Tag: blume-20020211-gensml
747 :     Description:
748 :    
749 :     A quick fix for a problem with GenSML (in the pgraph-util library):
750 :     Make generation of toplevel "local" optional. (Strictly speaking,
751 :     signature definitions within "local" are not legal SML.)
752 :    
753 :     Other than that: updates to INSTALL and cm/TODO.
754 :    
755 :     ----------------------------------------------------------------------
756 :     Name: Matthias Blume
757 : blume 1058 Date: 2002/02/08 15:00:00 EST
758 :     Tag: blume-20020208-uniquepid
759 :     Description:
760 :    
761 :     0. Version number has been bumped to 110.38.1. NEW BOOTFILES!!!
762 :    
763 :     1. The installer (config/install.sh) has gotten smarter:
764 :    
765 :     - Configuration options are a bit easier to specify now
766 :     (in config/targets).
767 :     - Bug in recognizing .tar.bz2 files fixed.
768 :     - Installer automatically resolves dependencies between
769 :     configuration options (e.g., if you ask for eXene, you will
770 :     also get cml -- regardless whether you asked for it or not).
771 :     - Installer can run in "quieter mode" by setting the environment
772 :     variable INSTALL_QUIETLY to "true". "Quieter" does not mean
773 :     "completely silent", though.
774 :     - Build HashCons library as part of smlnj-lib.
775 :    
776 :     2. A new scheme for assigning persistent identifiers to compilation
777 :     units (and, by extension, to types etc.) has been put into place.
778 :     This fixes a long-standing bug where types and even dynamic values
779 :     can get internally confused, thereby compromising type safety
780 :     (abstraction) and dynamic correctness. See
781 :    
782 :     http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
783 :    
784 :     for an example of how things could go wrong until now.
785 :    
786 :     The downside of the new scheme is that pids are not quite as
787 :     persistent as they used to be: CM will generate a fresh pid
788 :     for every compilation unit that it thinks it sees for the first
789 :     time. That means that if you compile starting from a clean, fresh
790 :     source tree at two different times, you end up with different
791 :     binaries.
792 :    
793 :     Cutoff recompilation, however, has not been compromised because
794 :     CM keeps pid information in special caches between runs.
795 :    
796 :     ----------------------------------------------------------------------
797 : george 1053 Name: Lal George
798 : george 1055 Date: 2002/02/07 15:34:13 EST 2002
799 :     Tag: <none>
800 :     Description:
801 :    
802 :     Compilers that generate assembly code may produce global labels
803 :     whose value is resolved at link time. The various peephole optimization
804 :     modules did not take this in account.
805 :    
806 :     TODO. The Labels.addrOf function should really return an option
807 :     type so that clients are forced to deal with this issue, rather
808 :     than an exception being raised.
809 :    
810 :     ----------------------------------------------------------------------
811 :     Name: Lal George
812 : george 1053 Date: 2002/02/06 13:55:02 EST
813 :     Tag: george-20020206-ra-breakup
814 :     Description:
815 :    
816 :     1. A bug fix from Allen.
817 :    
818 :     A typo causes extra fstp %st(0)'s to be generated at compensation
819 :     edges, which might cause stack underflow traps at runtime. This
820 :     occurs in fft where there are extraneous fstps right before the 'into'
821 :     trap instruction (in this case they are harmless since none of the
822 :     integers overflow.)
823 :    
824 : george 1054 2. Pulled out various utility modules that were embedded in the modules
825 : george 1053 of the register allocator. I need these modules for other purposes, but
826 : george 1054 they are not complete enough to put into a library (just yet).
827 : george 1053 ----------------------------------------------------------------------
828 : blume 1049 Name: Matthias Blume
829 :     Date: 2002/01/31 16:05:00 EST
830 :     Tag: blume-20020131-sparc-ccalls
831 :     Description:
832 :    
833 :     1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
834 :     of extra stack space by mistake. Fixed.
835 :    
836 :     2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
837 :    
838 :     ----------------------------------------------------------------------
839 : leunga 1048 Name: Allen Leung
840 :     Date: 2002/01/30
841 :     Tag: leunga-20020130-nowhere-bug-fix
842 :     Description:
843 :    
844 :     MLRISC bug fixes:
845 :     1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
846 :     2. MachineInt.fromString was negating its value.
847 :    
848 :     ----------------------------------------------------------------------
849 : blume 1039 Name: Matthias Blume
850 : blume 1047 Date: 2002/01/29
851 :     Tag: blume-20020129-INSTALL
852 :     Description:
853 :    
854 :     - Added somewhat detailed installation instructions (file INSTALL).
855 :     - Fixed curl-detection bug in config/install.sh.
856 :     - It is now possible to select the URL getter using the URLGETTER
857 :     environment variable:
858 :    
859 :     not set / "unknown" --> automatic detection (script tries wget,
860 :     curl, and lynx)
861 :     "wget" / "curl" / "lynx" --> use the specified program (script "knows"
862 :     how to properly invoke them)
863 :     other --> use $URLGETTER directly, it must take
864 :     precisely two command-line arguments
865 :     (source URL and destination file name)
866 :    
867 :     ----------------------------------------------------------------------
868 :     Name: Matthias Blume
869 : blume 1044 Date: 2002/01/28
870 : blume 1045 Tag: blume-20020128-sparc-ccalls
871 :     Description:
872 :    
873 :     - Fixed problem with calculation of "used" registers in sparc-c-calls.
874 :     - Make use of the allocParam argument in sparc-c-calls.
875 :    
876 :     ----------------------------------------------------------------------
877 :     Name: Matthias Blume
878 :     Date: 2002/01/28
879 : blume 1044 Tag: blume-20020128-allocParam
880 :     Description:
881 :    
882 :     John Reppy: Changes c-calls API to accept client-callback for
883 :     allocating extra stack space.
884 :     me: Corresponding changes to mlriscGen (using a dummy argument that
885 :     does not change the current behavior).
886 :    
887 :     ----------------------------------------------------------------------
888 :     Name: Matthias Blume
889 : blume 1040 Date: 2002/01/28 12:00:00
890 :     Tag: Release_110_38
891 :     Description:
892 :    
893 :     This time for real!!!
894 :    
895 :     ----------------------------------------------------------------------
896 :     Name: Matthias Blume
897 : blume 1039 Date: 2002/01/28 10:56:00 EST
898 :     Tag: blume-20020128-retraction
899 :     Description:
900 :    
901 :     0. Retracted earlier 110.38. (The Release_110_38 tag has been replaced
902 :     with blume-Release_110_38-retracted.)
903 :    
904 :     1. Fixed a problem with incorrect rounding modes in real64.sml.
905 :     (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
906 :    
907 :     2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
908 :     and enums fixed. The naming of corresponding ML identifiers should
909 :     now be consistent again.
910 :    
911 :     ----------------------------------------------------------------------
912 : leunga 1038 Name: Allen Leung
913 :     Date: 2002/01/27
914 :     Tag: leunga-20020127-nowhere
915 :     Description:
916 :    
917 :     Added a target called nowhere in the configuration scripts.
918 :     Enabling this will build the MLRISC 'nowhere' tool (for translating
919 :     programs with where-clauses into legal SML code) during installation.
920 :    
921 :     ----------------------------------------------------------------------
922 : blume 1036 Name: Matthias Blume
923 : leunga 1038 Date: 2002/01/25 21:27:00 EST
924 : blume 1039 Tag: blume-Release_110_38-retracted
925 : blume 1037 Description:
926 :    
927 :     Call it a (working) release! Version is 110.38. Bootfiles are ready.
928 :    
929 :     README will be added later.
930 :    
931 : blume 1039 !!! NOTE: Re-tagged as blume-Release_110_38-retracted. Original tag
932 :     (Release_110_38) removed. Reason: Last-minute bug fixes.
933 :    
934 : blume 1037 ----------------------------------------------------------------------
935 :     Name: Matthias Blume
936 : blume 1036 Date: 2002/01/25
937 :     Tag: blume-20020125-ffi
938 :     Description:
939 :    
940 :     A large number of tweaks and improvements to ml-nlffi-lib and
941 :     ml-nlffigen:
942 :    
943 :     - ML represenation types have been streamlined
944 :     - getter and setter functions work with concrete values, not abstract
945 :     ones where possible
946 :     - ml-nlffigen command line more flexible (see README file there)
947 :     - some bugs have been fixed (hopefully)
948 :    
949 :     ----------------------------------------------------------------------
950 : george 1034 Name: Lal George
951 :     Date: 2002/01/24
952 :     Tag: george-20020124-risc-ra-interface
953 :     Description:
954 :    
955 :     There is a dramatic simplification in the interface to the
956 :     register allocator for RISC architectures as a result of making
957 :     parallel copy instructions explicit.
958 :    
959 :     ----------------------------------------------------------------------
960 : blume 1028 Name: Matthias Blume
961 : blume 1032 Date: 2002/01/22
962 :     Tag: blume-20020122-x86-ccalls
963 :     Description:
964 :    
965 :     Bug fix for c-calls on x86 (having to do with how char- and
966 :     short-arguments are being handled).
967 :    
968 :     ----------------------------------------------------------------------
969 :     Name: Matthias Blume
970 : blume 1031 Date: 2002/01/21
971 :     Tag: blume-20020121-ff
972 :     Description:
973 :    
974 :     Another day of fiddling with the FFI...
975 :    
976 :     1. Bug fix/workaround: CKIT does not complain about negative array
977 :     dimensions, so ml-nlffigen has to guard itself against this possibility.
978 :     (Otherwise a negative dimension would send it into an infinite loop.)
979 :    
980 :     2. Some of the abstract types (light objects, light pointers, most "base"
981 :     types) in structure C are now eqtypes.
982 :    
983 :     3. Added constructors and test functions for NULL function pointers.
984 :    
985 :     ----------------------------------------------------------------------
986 :     Name: Matthias Blume
987 : blume 1028 Date: 2002/01/18
988 : blume 1030 Tag: blume-20020118-ready-for-new-release
989 :     Description:
990 :    
991 :     Made config/srcarchiveurl point to a new place. (Will provide boot
992 :     files shortly.)
993 :    
994 :     Maybe we christen this to be 110.38?
995 :    
996 :     ----------------------------------------------------------------------
997 :     Name: Matthias Blume
998 :     Date: 2002/01/18
999 : blume 1029 Tag: blume-20020118-more-ffifiddle
1000 :     Description:
1001 :    
1002 :     Today's FFI fiddling:
1003 :    
1004 :     - Provided a structure CGetSet with "convenient" versions of C.Get.* and
1005 :     C.Set.* that use concrete (MLRep.*) arguments and results instead
1006 :     of abstract ones.
1007 :    
1008 :     - Provided word-style bit operations etc. for "int" representation
1009 :     types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
1010 :     and Long.
1011 :    
1012 :     ----------------------------------------------------------------------
1013 :     Name: Matthias Blume
1014 :     Date: 2002/01/18
1015 : blume 1028 Tag: blume-20020118-use-x86-fp
1016 :     Description:
1017 :    
1018 :     Now that x86-fast-fp seems to be working, I turned it back on again
1019 :     by default. (Seems to work fine now, even with the FFI.)
1020 :    
1021 :     Other than that, I added some documentation about the FFI to
1022 :     src/ml-nlffigen/README and updated the FFI test examples in
1023 :     src/ml-nlffi-lib/Tests/*.
1024 :    
1025 :     ----------------------------------------------------------------------
1026 : leunga 1025 Name: Allen Leung
1027 :     Date: 2002/01/17
1028 :     Tag: leunga-20020117-x86-fast-fp-call
1029 :     Description:
1030 :    
1031 :     1. Fixed a problem with handling return fp values when x86's fast fp
1032 :     mode is turned on.
1033 :    
1034 :     2. Minor pretty printing fix for cellset. Print %st(0) as %st(0) instead
1035 :     of %f32.
1036 :    
1037 :     3. Added a constructor INT32lit to the ast of MLRISC tools.
1038 :    
1039 :     ----------------------------------------------------------------------
1040 : blume 1021 Name: Matthias Blume
1041 :     Date: 2002/01/16
1042 :     Tag: blume-20020116-ffifiddle
1043 :     Description:
1044 :    
1045 :     More fiddling with the FFI interface:
1046 :    
1047 :     - Make constness 'c instead of rw wherever possible. This eliminates
1048 :     the need for certain explicit coercions. (However, due to ML's
1049 :     value polymorphism, there will still be many cases where explicit
1050 :     coercions are necessary. Phantom types are not the whole answer
1051 :     to modeling a subtyping relationship in ML.)
1052 :    
1053 :     - ro/rw coersions for pointers added. (Avoids the detour through */&.)
1054 :    
1055 :     - "printf" test example added to src/ml-nlffi-lib/Tests. (Demonstrates
1056 :     clumsy workaround for varargs problem.)
1057 :    
1058 :     ----------------------------------------------------------------------
1059 : george 1016 Name: Lal George
1060 :     Date: 2002/01/15
1061 :     Tag: <none>
1062 :     Description:
1063 :    
1064 :     1. Since COPY instructions are no longer native to the architecture,
1065 :     a generic functor can be used to implement the expandCopies function.
1066 :    
1067 :     2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
1068 :     TEXT segment.
1069 :    
1070 :     ----------------------------------------------------------------------
1071 : blume 1011 Name: Matthias Blume
1072 : blume 1015 Date: 2002/01/15
1073 :     Tag: blume-20020115-ffiupdates
1074 :     Description:
1075 :    
1076 :     1. Fix for bug resulting in single-precision float values being returned
1077 :     incorrectly from FFI calls.
1078 :    
1079 :     2. Small modifications to C FFI API:
1080 :    
1081 :     - memory-allocation routines return straight objects (no options)
1082 :     and raise an exception in out-of-memory situations
1083 :     - unsafe extensions to cast between function pointers and pointers
1084 :     from/to ints
1085 :     - added structure C_Debug as an alternative to structure C where
1086 :     pointer-dereferencing (|*| and |*!) always check for null-pointers
1087 :     - added open_lib' to DynLinkage; open_lib' works like open_lib
1088 :     but also takes a (possibly empty) list of existing library handles
1089 :     that the current library depends on
1090 :    
1091 :     ----------------------------------------------------------------------
1092 :     Name: Matthias Blume
1093 : blume 1011 Date: 2002/01/10
1094 :     Tag: blume-20020110-newffigen
1095 :     Description:
1096 :    
1097 :     1. Updates to portable graph code.
1098 :    
1099 :     2. Major update to ml-nlffigen and ml-nlffi-lib. Things are much
1100 :     more scalable now so that even huge interfaces such as the one
1101 :     for GTK compile in finite time and space. :-)
1102 :     See src/ml-nlffigen/README for details on what's new.
1103 :    
1104 :     ----------------------------------------------------------------------
1105 : george 1003 Name: Lal George
1106 : george 1009 Date: 2001/01/09 14:31:35 EST 2002
1107 :     Tag: george-20011206-rm-native-copy
1108 :     Description:
1109 :    
1110 :     Removed the native COPY and FCOPY instructions
1111 :     from all the architectures and replaced it with the
1112 :     explicit COPY instruction from the previous commit.
1113 :    
1114 :     It is now possible to simplify many of the optimizations
1115 :     modules that manipulate copies. This has not been
1116 :     done in this change.
1117 :    
1118 :     ----------------------------------------------------------------------
1119 :     Name: Lal George
1120 : george 1003 Date: 2001/12/06 16:50:13 EST 2001
1121 :     Tag: george-20011206-mlrisc-instruction
1122 :     Description:
1123 : george 824
1124 : george 1003 Changed the representation of instructions from being fully abstract
1125 :     to being partially concrete. That is to say:
1126 :    
1127 :     from
1128 :     type instruction
1129 :    
1130 :     to
1131 :     type instr (* machine instruction *)
1132 :    
1133 :     datatype instruction =
1134 :     LIVE of {regs: C.cellset, spilled: C.cellset}
1135 :     | KILL of {regs: C.cellset, spilled: C.cellset}
1136 :     | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
1137 :     | ANNOTATION of {i: instruction, a: Annotations.annotation}
1138 :     | INSTR of instr
1139 :    
1140 :     This makes the handling of certain special instructions that appear on
1141 :     all architectures easier and uniform.
1142 :    
1143 :     LIVE and KILL say that a list of registers are live or killed at the
1144 :     program point where they appear. No spill code is generated when an
1145 :     element of the 'regs' field is spilled, but the register is moved to
1146 :     the 'spilled' (which is present, more for debugging than anything else).
1147 :    
1148 :     LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
1149 :     We used to generate:
1150 :    
1151 :     DEFFREG f1
1152 :     f1 := f2 + f3
1153 :     trapb
1154 :    
1155 :     but now generate:
1156 :    
1157 :     f1 := f2 + f3
1158 :     trapb
1159 :     LIVE {regs=[f1,f2,f3], spilled=[]}
1160 :    
1161 :     Furthermore, the DEFFREG (hack) required that all floating point instruction
1162 :     use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
1163 :     defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
1164 :     in a cleaner alpha implementation. (Hopefully, intel will not get rid of
1165 :     this architecture).
1166 :    
1167 :     COPYXXX is intended to replace the parallel COPY and FCOPY available on
1168 :     all the architectures. This will result in further simplification of the
1169 :     register allocator that must be aware of them for coalescing purposes, and
1170 :     will also simplify certain aspects of the machine description that provides
1171 :     callbacks related to parallel copies.
1172 :    
1173 :     ANNOTATION should be obvious, and now INSTR represents the honest to God
1174 :     machine instruction set!
1175 :    
1176 :     The <arch>/instructions/<arch>Instr.sml files define certain utility
1177 :     functions for making porting easier -- essentially converting upper case
1178 :     to lower case. All machine instructions (of type instr) are in upper case,
1179 :     and the lower case form generates an MLRISC instruction. For example on
1180 :     the alpha we have:
1181 :    
1182 :     datatype instr =
1183 :     LDA of {r:cell, b:cell, d:operand}
1184 :     | ...
1185 :    
1186 :     val lda : {r:cell, b:cell, d:operand} -> instruction
1187 :     ...
1188 :    
1189 :     where lda is just (INSTR o LDA), etc.
1190 :    
1191 : leunga 815 ----------------------------------------------------------------------
1192 : blume 986 Name: Matthias Blume
1193 : blume 993 Date: 2001/11/22 21:40:00 EST
1194 :     Tag: Release_110_37
1195 :     Description:
1196 :    
1197 :     Release 110.37. This time for real.
1198 :    
1199 :     ----------------------------------------------------------------------
1200 :     Name: Matthias Blume
1201 : blume 988 Date: 2001/11/21 16:35:00 EST
1202 :     Tag: blume-20011121-foot-in-mouth
1203 :     Description:
1204 :    
1205 :     Removed the "Release_110_37" tag because of a serious bug.
1206 :     This will be re-tagged once the bug is fixed.
1207 :    
1208 :     ----------------------------------------------------------------------
1209 :     Name: Matthias Blume
1210 : blume 987 Date: 2001/11/21 16:14:00 EST
1211 :     Tag: blume-20011121-forgottenfile
1212 :     Description:
1213 :    
1214 :     Forgot to add a file. (Just a .tex-file -- part of
1215 :     the CM manual source.)
1216 :    
1217 :     ----------------------------------------------------------------------
1218 :     Name: Matthias Blume
1219 : blume 986 Date: 2001/11/21 16:10:00 EST
1220 : blume 988 Tag: blume-20011121-invalid_110_37
1221 : blume 986 Description:
1222 :    
1223 : blume 988 Note: I removed the original tag "Release_110_37" from this commit
1224 :     because we found a serious bug in all non-x86 backends.
1225 :     - Matthias
1226 :    
1227 : blume 986 1. Modifications to the SML/NJ code generator and to the runtime system
1228 :     so that code object name strings are directly inserted into code
1229 :     objects at code generation time. The only business the runtime system
1230 :     has with this is now to read the name strings on occasions.
1231 :     (The encoding of the name string has also changed somewhat.)
1232 :    
1233 :     2. CM now implements a simple "set calculus" for specifying export lists.
1234 :     In particular, it is now possible to refer to the export lists of
1235 :     other libraries/groups/sources and form unions as well as differences.
1236 :     See the latest CM manual for details.
1237 :    
1238 :     3. An separate notion of "proxy" libraries has again be eliminated from
1239 :     CM's model. (Proxy libraries are now simply a special case of using
1240 :     the export list calculus.)
1241 :    
1242 :     4. Some of the existing libraries now take advantage of the new set
1243 :     calculus.
1244 :     (Notice that not all libraries have been converted because some
1245 :     of the existing .cm-files are supposed to be backward compatible
1246 :     with 110.0.x.)
1247 :    
1248 :     5. Some cleanup in stand-alone programs. (Don't use "exnMessage" -- use
1249 :     "General.exnMessage"! The former relies on a certain hook to be
1250 :     initialized, and that often does not happen in the stand-alone case.)
1251 :    
1252 :     ----------------------------------------------------------------------
1253 : george 984 Name: Lal George
1254 :     Date: 2001/11/21 13:56:18 EST
1255 :     Tag: george-2001121-pseudo-ops
1256 :     Description:
1257 :    
1258 :     Implemented a complete redesign of MLRISC pseudo-ops. Now there
1259 :     ought to never be any question of incompatabilities with
1260 :     pseudo-op syntax expected by host assemblers.
1261 :    
1262 :     For now, only modules supporting GAS syntax are implemented
1263 :     but more should follow, such as MASM, and vendor assembler
1264 :     syntax, e.g. IBM as, Sun as, etc.
1265 :    
1266 :     ----------------------------------------------------------------------
1267 : blume 977 Name: Matthias Blume
1268 :     Date: 2001/11/14 11:52:00 EST
1269 :     Tag: blume-20011114-srcname
1270 :     Description:
1271 :    
1272 :     1. Routed the name of the current source file to mlriscgen where it
1273 :     should be directly emitted into the code object. (This last part
1274 :     is yet to be done.)
1275 :    
1276 :     2. Some cleanup of the pgraph code to make it match the proposal that
1277 :     I put out the other day. (The proposal notwithstanding, things are
1278 :     still in flux here.)
1279 :    
1280 :     ----------------------------------------------------------------------
1281 : george 976 Name: Lal George
1282 :     Date: 2001/11/14 09:44:04 EST
1283 :     Tag:
1284 :     Description:
1285 :    
1286 :     Fix for a backpatching bug reported by Allen.
1287 :    
1288 :     Because the boundary between short and long span-dependent
1289 :     instructions is +/- 128, there are an astounding number of
1290 :     span-dependent instructions whose size is over estimated.
1291 :    
1292 :     Allen came up with the idea of letting the size of span
1293 :     dependent instructions be non-monotonic, for a maxIter
1294 :     number of times, after which the size must be monotonically
1295 :     increasing.
1296 :    
1297 :     This table shows the number of span-dependent instructions
1298 :     whose size was over-estimated as a function of maxIter, for the
1299 :     file Parse/parse/ml.grm.sml:
1300 :    
1301 :     maxIter # of instructions:
1302 :     10 687
1303 :     20 438
1304 :     30 198
1305 :     40 0
1306 :    
1307 :     In compiling the compiler, there is no significant difference in
1308 :     compilation speed between maxIter=10 and maxIter=40. Actually,
1309 :     my measurements showed that maxIter=40 was a tad faster than
1310 :     maxIter=10! Also 96% of the files in the compiler reach a fix
1311 :     point within 13 iterations, so fixing maxIter at 40, while high,
1312 :     is okay.
1313 :    
1314 :     ----------------------------------------------------------------------
1315 : blume 975 Name: Matthias Blume
1316 :     Date: 2001/10/31 15:25:00 EST
1317 :     Tag: blume-20011031-pgraph
1318 :     Description:
1319 :    
1320 :     CKIT:
1321 :     * Changed the "Function" constructor of type Ast.ctype to carry optional
1322 :     argument identifiers.
1323 :     * Changed the return type of TypeUtil.getFunction accordingly.
1324 :     * Type equality ignores the argument names.
1325 :     * TypeUtil.composite tries to preserve argument names but gives up quickly
1326 :     if there is a mismatch.
1327 :    
1328 :     installation script:
1329 :     * attempts to use "curl" if available (unless "wget" is available as well)
1330 :    
1331 :     CM:
1332 :     * has an experimental implementation of "portable graphs" which I will
1333 :     soon propose as an implementation-independent library format
1334 :     * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
1335 :    
1336 :     NLFFI-LIB:
1337 :     * some cleanup (all cosmetic)
1338 :    
1339 :     NLFFIGEN:
1340 :     * temporarily disabled the mechanism that suppresses ML output for
1341 :     C definitions whose identifiers start with an underscore character
1342 :     * generate val bindings for enum constants
1343 :     * user can request that only one style (light or heavy) is being used;
1344 :     default is to use both (command-line arguments: -heavy and -light)
1345 :     * fixed bug in handling of function types involving incomplete pointers
1346 :     * generate ML entry points that take record arguments (i.e., using
1347 :     named arguments) for C functions that have a prototype with named
1348 :     arguments
1349 :     (see changes to CKIT)
1350 :    
1351 :     ----------------------------------------------------------------------
1352 : leunga 972 Name: Allen Leung
1353 :     Date: 2001/10/27 20:34:00 EDT
1354 :     Tag: leunga-20011027-x86-fast-fp-call
1355 :     Description:
1356 :    
1357 :     Fixed the bug described in blume-20010920-slowfp.
1358 :    
1359 :     The fix involves
1360 :     1. generating FCOPYs in FSTP in ia32-svid
1361 :     2. marking a CALL with the appropriate annotation
1362 :    
1363 :     ----------------------------------------------------------------------
1364 : blume 961 Name: Matthias Blume
1365 :     Date: 2001/10/16 11:32:00 EDT
1366 :     Tag: blume-20011016-netbsd
1367 :     Description:
1368 :    
1369 :     Underscore patch from Chris Richards (fixing problem with compiling
1370 :     runtime system under recent NetBSD).
1371 :    
1372 :     ----------------------------------------------------------------------
1373 : george 959 Name: Allen Leung
1374 :     Date: 2001/10/12 17:18:32 EDT 2001
1375 :     Tag: leung-20011012-x86-printflowgraph
1376 :     Description:
1377 :    
1378 :     X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
1379 :    
1380 :     ----------------------------------------------------------------------
1381 : george 952 Name: Lal George
1382 : george 958 Date: 2001/10/11 23:51:34 EDT
1383 :     Tag: george-20011011-too-many-instrs
1384 :     Description:
1385 :    
1386 :     The representation of a program point never expected to see more
1387 :     than 65536 instructions in a basic block!
1388 :    
1389 :     ----------------------------------------------------------------------
1390 :     Name: Lal George
1391 : george 952 Date: 2001/10/09 09:41:37 EDT
1392 :     Tag: george-20011008-mlrisc-labels
1393 :     Description:
1394 :    
1395 :     Changed the machine description files to support printing of
1396 :     local and global labels in assembly code, based on host assembler
1397 :     conventions.
1398 :    
1399 :     ----------------------------------------------------------------------
1400 : blume 916 Name: Matthias Blume
1401 : blume 939 Date: 2001/09/25 15:25:00 EDT
1402 :     Tag: blume-20010925-exninfo
1403 :     Description:
1404 :    
1405 :     I provided a non-hook implementation of exnName (at the toplevel) and
1406 :     made the "dummy" implementation of exnMessage (at the toplevel) more
1407 :     useful: if nothing gets "hooked in", then at least you are going to
1408 :     see the exception name and a message indicating why you don't see more.
1409 :    
1410 :     [For the time being, programs that need exnMessage and want to use
1411 :     ml-build should either use General.exnMessage (strongly recommended) or
1412 :     refer to structure General at some other point so that CM sees a
1413 :     static dependency.]
1414 :    
1415 :     [Similar remarks go for "print" and "use": If you want to use their
1416 :     functionality in stand-alone programs generated by ml-build, then use
1417 :     TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
1418 :    
1419 :     ----------------------------------------------------------------------
1420 :     Name: Matthias Blume
1421 : blume 938 Date: 2001/09/20 17:28:00 EDT
1422 :     Tag: blume-20010920-slowfp
1423 :     Description:
1424 :    
1425 :     Allen says that x86-fast-fp is not safe yet, so I turned it off again...
1426 :    
1427 :     ----------------------------------------------------------------------
1428 :     Name: Matthias Blume
1429 : blume 937 Date: 2001/09/20 17:20:00 EDT
1430 :     Tag: blume-20010920-canonicalpaths
1431 :     Description:
1432 :    
1433 :     0. Updated the BOOT file (something that I forgot to do earlier).
1434 :    
1435 :     1. Small internal change to CM so that it avoids "/../" in filenames
1436 :     as much as possible (but only where it is safe).
1437 :    
1438 :     2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
1439 :     that arguments that contain delimiters are passed through correctly.
1440 :     This change also means that all "special" arguments of the form
1441 :     @SMLxxx... must come first.
1442 :    
1443 :     3. Changed install script to put relative anchor names for tool commands
1444 :     into pathconfig.
1445 :    
1446 :     ----------------------------------------------------------------------
1447 :     Name: Matthias Blume
1448 : blume 932 Date: 2001/09/18 15:35:00 EDT
1449 :     Tag: blume-20010918-readme11036
1450 :     Description:
1451 :    
1452 :     Added README files.
1453 :    
1454 :     ----------------------------------------------------------------------
1455 :     Name: Matthias Blume
1456 : blume 929 Date: 2001/09/18 11:45:00 EDT
1457 :     Tag: Release_110_36 (retag)
1458 :     Description:
1459 :    
1460 :     Fixed mistake in config/preloads. Retagged as 110.36.
1461 :    
1462 :     ----------------------------------------------------------------------
1463 :     Name: Matthias Blume
1464 : blume 928 Date: 2001/09/18 09:40:00 EDT
1465 : blume 929 Tag: Release_110_36_orig (tag changed)
1466 : blume 928 Description:
1467 :    
1468 :     New version (110.36). New bootfiles.
1469 :    
1470 :     ----------------------------------------------------------------------
1471 :     Name: Matthias Blume
1472 : blume 927 Date: 2001/09/14 16:15:00 EDT
1473 :     Tag: blume-20010914-x86fastfp
1474 :     Description:
1475 :    
1476 :     John committed some changes that Allen made, in particular a (hopefully)
1477 :     correctly working version of the x86-fp module.
1478 :    
1479 :     I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
1480 :     flag to "true". Everything seems to compile to a fixpoint ok, and
1481 :     "mandelbrot" speeds up by about 15%.
1482 :    
1483 :     ----------------------------------------------------------------------
1484 :     Name: Matthias Blume
1485 : blume 923 Date: 2001/09/13 11:20:00 EDT
1486 :     Tag: blume-20010913-minimal
1487 :     Description:
1488 :    
1489 :     1. Stefan Monnier's patch to fix a miscompilation problem that
1490 :     was brought to light by John Reppy's work on Moby.
1491 :    
1492 :     2. Implemented a minimal "structure Compiler" that contains just
1493 :     "version" and "architecture". The minimal version will be
1494 :     available when the full version is not. This is for backward-
1495 :     compatibility with code that wants to test Compiler.version.
1496 :    
1497 :     ----------------------------------------------------------------------
1498 :     Name: Matthias Blume
1499 : blume 920 Date: 2001/08/28 14:03:00 EDT
1500 :     Tag: blume-20010828-ml-lex
1501 :     Description:
1502 :    
1503 :     Fix for bug 1581, received from Neophytos Michael.
1504 :    
1505 :     ----------------------------------------------------------------------
1506 :     Name: Matthias Blume
1507 : blume 918 Date: 2001/08/27 11:20:00 EDT
1508 :     Tag: blume-20010827-readme11035
1509 :     Description:
1510 :    
1511 :     Fleshed out the README file for 110.35.
1512 :    
1513 :     ----------------------------------------------------------------------
1514 :     Name: Matthias Blume
1515 : blume 916 Date: 2001/08/24 17:10:00 EDT
1516 :     Tag: Release_110_35
1517 :     Description:
1518 :    
1519 :     New version number (110.35). New bootfiles.
1520 :    
1521 :     ----------------------------------------------------------------------
1522 : george 915 Name: Lal George
1523 : george 909 Date: 2001/08/24 13:47:18 EDT 2001
1524 :     Tag: george-20010824-MLRISC-graphs
1525 :     Description:
1526 :    
1527 :     removed clusters from MLRISC completely and replaced with graphs.
1528 :    
1529 :     ----------------------------------------------------------------------
1530 :     Name: Matthias Blume
1531 : blume 905 Date: 2001/08/23 17:50:00 EDT
1532 :     Tag: blume-20010823-toplevel
1533 :     Description:
1534 :    
1535 :     - some reorganization of the code that implements various kinds of
1536 :     environments in the compiler (static, dynamic, symbolic, combined)
1537 :     - re-implemented the EnvRef module so that evalStream works properly
1538 :     (if the stream contains references to "use", "CM.make", etc.)
1539 :     - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
1540 :    
1541 :     ----------------------------------------------------------------------
1542 :     Name: Matthias Blume
1543 : blume 904 Date: 2001/08/20 15:50 EDT
1544 :     Tag: blume20010820-slipup
1545 :     Description:
1546 :    
1547 :     I forgot to commit a few files. Here they are...
1548 :    
1549 :     ----------------------------------------------------------------------
1550 :     Name: Matthias Blume
1551 : blume 903 Date: 2001/08/20 15:35:00 EDT
1552 :     Tag: blume-20010820-debugprof
1553 :     Description:
1554 :    
1555 :     !!!! NEW BOOTFILES !!!!
1556 :    
1557 :     This is another round of reorganizing the compiler sources. This
1558 :     time the main goal was to factor out all the "instrumentation"
1559 :     passes (for profiling and backtracing) into their own library.
1560 :     The difficulty was to do it in such a way that it does not depend
1561 :     on elaborate.cm but only on elabdata.cm.
1562 :    
1563 :     Therefore there have been further changes to both elaborate.cm and
1564 :     elabdata.cm -- more "generic" things have been moved from the former
1565 :     to the latter. As a result, I was forced to split the assignment
1566 :     of numbers indicating "primtyc"s into two portions: SML-generic and
1567 :     SML/NJ-specific. Since it would have been awkward to maintain,
1568 :     I bit the bullet and actually _changed_ the mapping between these
1569 :     numbers and primtycs. The bottom line of this is that you need
1570 :     a new set of bin- and bootfiles.
1571 :    
1572 :     I have built new bootfiles for all architectures, so doing a fresh
1573 :     checkout and config/install.sh should be all you need.
1574 :    
1575 :     The newly created library's name is
1576 :    
1577 :     $smlnj/viscomp/debugprof.cm
1578 :    
1579 :     and its sources live under
1580 :    
1581 :     src/compiler/DebugProf
1582 :    
1583 :     ----------------------------------------------------------------------
1584 :     Name: Matthias Blume
1585 : blume 902 Date: 2001/08/15 17:15:00 EDT
1586 :     Tag: blume-20010815-compreorg
1587 :     Description:
1588 :    
1589 :     This is a first cut at reorganizing the CM libraries that make up the
1590 :     core of the compiler. The idea is to separate out pieces that could
1591 :     be used independently by tools, e.g., the parser, the typechecker, etc.
1592 :    
1593 :     The current status is a step in this direction, but it is not quite
1594 :     satisfactory yet. Expect more changes in the future.
1595 :    
1596 :     Here is the current (new) organization...
1597 :    
1598 :     What used to be $smlnj/viscomp/core.cm is now divided into
1599 :     six CM libraries:
1600 :    
1601 :     $smlnj/viscomp/basics.cm
1602 :     /parser.cm
1603 :     /elabdata.cm
1604 :     /elaborate.cm
1605 :     /execute.cm
1606 :     /core.cm
1607 :    
1608 :     The CM files for these libraries live under src/system/smlnj/viscomp.
1609 :     All these libraries are proxy libraries that contain precisely
1610 :     one CM library component. Here are the locations of the components
1611 :     (all within the src/compiler tree):
1612 :    
1613 :     Basics/basics.cm
1614 :     Parse/parser.cm
1615 :     ElabData/elabdata.cm
1616 :     Elaborator/elaborate.cm
1617 :     Execution/execute.cm
1618 :     core.cm
1619 :    
1620 :     [This organization is the same that has been used already
1621 :     for a while for the architecture-specific parts of the visible
1622 :     compiler and for the old version of core.cm.]
1623 :    
1624 :     As you will notice, many source files have been moved from their
1625 :     respective original locations to a new home in one of the above
1626 :     subtrees.
1627 :    
1628 :     The division of labor between the new libraries is the following:
1629 :    
1630 :     basics.cm:
1631 :     - Simple, basic definitions that pertain to many (or all) of
1632 :     the other libraries.
1633 :     parser.cm:
1634 :     - The SML parser, producing output of type Ast.dec.
1635 :     - The type family for Ast is also defined and exported here.
1636 :     elabdata.cm:
1637 :     - The datatypes that describe input and output of the elaborator.
1638 :     This includes types, absyn, and static environments.
1639 :     elaborator.cm:
1640 :     - The SML/NJ type checker and elaborator.
1641 :     This maps an Ast.dec (with a given static environment) to
1642 :     an Absyn.dec (with a new static environment).
1643 :     - This libraries implements certain modules that used to be
1644 :     structures as functors (to remove dependencies on FLINT).
1645 :     execute.cm:
1646 :     - Everything having to do with executing binary code objects.
1647 :     - Dynamic environments.
1648 :     core.cm:
1649 :     - SML/NJ-specific instantiations of the elaborator and MLRISC.
1650 :     - Top-level modules.
1651 :     - FLINT (this should eventually become its own library)
1652 :    
1653 :     Notes:
1654 :    
1655 :     I am not 100% happy with the way I separated the elaborator (and its
1656 :     data structures) from FLINT. Two instances of the same problem:
1657 :    
1658 :     1. Data structures contain certain fields that carry FLINT-specific
1659 :     information. I hacked around this using exn and the property list
1660 :     module from smlnj-lib. But the fact that there are middle-end
1661 :     specific fields around at all is a bit annoying.
1662 :    
1663 :     2. The elaborator calculates certain FLINT-related information. I tried
1664 :     to make this as abstract as I could using functorization, but, again,
1665 :     the fact that the elaborator has to perform calculations on behalf
1666 :     of the middle-end at all is not nice.
1667 :    
1668 :     3. Having to used exn and property lists is unfortunate because it
1669 :     weakens type checking. The other alternative (parameterizing
1670 :     nearly *everything*) is not appealing, though.
1671 :    
1672 :     I removed the "rebinding =" warning hack because due to the new organization
1673 :     it was awkward to maintain it. As a result, the compiler now issues some of
1674 :     these warnings when compiling init.cmi during bootstrap compilation. On
1675 :     the plus side, you also get a warning when you do, for example:
1676 :     val op = = Int32.+
1677 :     which was not the case up to now.
1678 :    
1679 :     I placed "assign" and "deref" into the _Core structure so that the
1680 :     code that deals with the "lazy" keyword can find them there. This
1681 :     removes the need for having access to the primitive environment
1682 :     during elaboration.
1683 :    
1684 :     ----------------------------------------------------------------------
1685 :     Name: Matthias Blume
1686 : blume 898 Date: 2001/08/13
1687 :     Tag: blume-20010813-closures
1688 :     Description:
1689 :    
1690 :     This fix was sent to us by Zhong Shao. It is supposed to improve the
1691 :     performance of certain loops by avoiding needless closure allocation.
1692 :    
1693 :     ----------------------------------------------------------------------
1694 : george 890 Name: Lal George
1695 : george 896 Date: 2001/07/31 10:03:23 EDT 2001
1696 :     Tag: george-20010731-x86-fmalloc
1697 :     Description: Fixed bug in x86 calls
1698 :    
1699 :     There was a bug where call instructions would mysteriously
1700 :     vanish. The call instruction had to be one that returned
1701 :     a floating point value.
1702 :    
1703 :     ----------------------------------------------------------------------
1704 :     Name: Lal George
1705 : george 890 Date: 2001/07/19 16:36:29 EDT 2001
1706 :     Tag: george-20010719-simple-cells
1707 :     Description:
1708 :    
1709 :     I have dramatically simplified the interface for CELLS in MLRISC.
1710 :    
1711 :     In summary, the cells interface is broken up into three parts:
1712 :    
1713 :     1. CellsBasis : CELLS_BASIS
1714 :    
1715 :     CellsBasis is a top level structure and common for all
1716 :     architectures. it contains the definitions of basic datatypes
1717 :     and utility functions over these types.
1718 :    
1719 :     2. functor Cells() : CELLS
1720 :    
1721 :     Cells generates an interface for CELLS that incorporates the
1722 :     specific resources on the target architecture, such as the
1723 :     presence of special register classes, their number and size,
1724 :     and various useful substructures.
1725 :    
1726 :     3. <ARCH>CELLS
1727 :    
1728 :     e.g. SparcCells: SPARCCELLS
1729 :    
1730 :     <ARCH>CELLS usually contains additional bindings for special
1731 :     registers on the architecture, such as:
1732 :    
1733 :     val r0 : cell (* register zero *)
1734 :     val y : cell (* Y register *)
1735 :     val psr : cell (* processor status register *)
1736 :     ...
1737 :    
1738 :     The structure returned by applying the Cells functor is opened
1739 :     in this interface.
1740 :    
1741 :     The main implication of all this is that the datatypes for cells is
1742 :     split between CellsBasis and CELLS -- a fairly simple change for user
1743 :     code.
1744 :    
1745 :     In the old scheme the CELLS interface had a definitional binding of
1746 :     the form:
1747 :    
1748 :     signature CELLS = sig
1749 :    
1750 :     structure CellsBasis = CellsBasis
1751 :    
1752 :     ...
1753 :    
1754 :     end
1755 :    
1756 :     With all the sharing constraints that goes on in MLRISC, this old
1757 :     design quickly leads to errors such as:
1758 :    
1759 :     "structure definition spec inside of sharing ... "
1760 :    
1761 :    
1762 :     and appears to require an unacceptable amount of sharing and where
1763 :     constraint hackery.
1764 :    
1765 :     I think this error message (the interaction of definitional specs and
1766 :     sharing) requires more explanation on our web page.
1767 :    
1768 :     ----------------------------------------------------------------------
1769 : blume 826 Name: Matthias Blume
1770 : blume 879 Date: 2001/07/19 15:00:00 EDT
1771 :     Tag: blume-20010719-libreorg
1772 :     Description:
1773 :    
1774 :     This update puts together a fairly extensive but straightforward change
1775 :     to the way the libraries that implement the interactive system are
1776 :     organized:
1777 :    
1778 :     The biggest change is the elimination of structure Compiler. As a
1779 :     replacement for this structure, there is now a CM library
1780 :     (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
1781 :     that exports all the substructures of the original structure Compiler
1782 :     directly. So instead of saying Compiler.Foo.bar one now simply
1783 :     says Foo.bar. (The CM libraries actually export a collection of
1784 :     structures that is richer than the collection of substructures of
1785 :     structure Compiler.)
1786 :    
1787 :     To make the transition smooth, there is a separate library called
1788 :     $smlnj/compiler/compiler.cm which puts together and exports the
1789 :     original structure Compiler (or at least something very close to it).
1790 :    
1791 :     There are five members of the original structure Compiler
1792 :     that are not exported directly but which instead became members
1793 :     of a new structure Backend (described by signature BACKEND). These are:
1794 :     structure Profile (: PROFILE), structure Compile (: COMPILE), structure
1795 :     Interact (: INTERACT), structure Machine (: MACHINE), and val
1796 :     architecture (: string).
1797 :    
1798 :     Structure Compiler.Version has become structure CompilerVersion.
1799 :    
1800 :     Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
1801 :     by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
1802 :     or x86, respectively.
1803 :     Each of these exports the same frontend structures that
1804 :     $smlnj/compiler.cm exports. But they do not have a structure Backend
1805 :     and instead export some structure <Arch>Backend where <Arch> is Alpha32,
1806 :     Hppa, PPC, Sparc, or X86, respectively.
1807 :    
1808 :     Library $smlnj/compiler/all.cm exports the union of the exports of
1809 :     $smlnj/compiler/<arch>.cm
1810 :    
1811 :     There are no structures <Arch>Compiler anymore, use
1812 :     $smlnj/compiler/<arch>.cm instead.
1813 :    
1814 :     Library host-compiler-0.cm is gone. Instead, the internal library
1815 :     that instantiates CM is now called cm0.cm. Selection of the host
1816 :     compiler (backend) is no longer done here but. (Responsibility for it
1817 :     now lies with $smlnj/compiler/current.cm. This seems to be more
1818 :     logical.)
1819 :    
1820 :     Many individual files have been moved or renamed. Some files have
1821 :     been split into multiple files, and some "dead" files have been deleted.
1822 :    
1823 :     Aside from these changes to library organization, there are also changes
1824 :     to the way the code itself is organized:
1825 :    
1826 :     Structure Binfile has been re-implemented in such a way that it no
1827 :     longer needs any knowledge of the compiler. It exclusively deals
1828 :     with the details of binfile layout. It no longer invokes the
1829 :     compiler (for the purpose of creating new prospective binfile
1830 :     content), and it no longer has any knowledge of how to interpret
1831 :     pickles.
1832 :    
1833 :     Structure Compile (: COMPILE) has been stripped down to the bare
1834 :     essentials of compilation. It no longer deals with linking/execution.
1835 :     The interface has been cleaned up considerably.
1836 :    
1837 :     Utility routines for dealing with linking and execution have been
1838 :     moved into their own substructures.
1839 :    
1840 :     (The ultimate goal of these changes is to provide a light-weight
1841 :     binfile loader/linker (at least for, e.g., stable libraries) that
1842 :     does not require CM or the compiler to be present.)
1843 :    
1844 :     CM documentation has been updated to reflect the changes to library
1845 :     organization.
1846 :    
1847 :     ----------------------------------------------------------------------
1848 :     Name: Matthias Blume
1849 : blume 875 Date: 2001/07/10 17:30:00 EDT
1850 :     Tag: Release_110_34
1851 :     Description:
1852 :    
1853 : blume 876 Minor tweak to 110.34 (re-tagged):
1854 :    
1855 :     - README.html file added to CVS repository
1856 :     - runtime compiles properly under FreeBSD 3.X and 4.X
1857 :    
1858 :     ----------------------------------------------------------------------
1859 :     Name: Matthias Blume
1860 :     Date: 2001/07/10 17:30:00 EDT
1861 :     Tag: Release_110_34
1862 :     Description:
1863 :    
1864 : blume 875 New version number (110.34). New bootfiles.
1865 :    
1866 :     ----------------------------------------------------------------------
1867 :     Name: Matthias Blume
1868 : blume 874 Date: 2001/07/09 16:00:00 EDT
1869 :     Tag: blume-20010709-more-varargs
1870 :     Description:
1871 :    
1872 :     I changed the handling of varargs in ml-nlffigen again:
1873 :     The ellipsis ... will now simply be ignored (with an accompanying warning).
1874 :    
1875 :     The immediate effect is that you can actually call a varargs function
1876 :     from ML -- but you can't actually supply any arguments beyond the ones
1877 :     specified explicitly. (For example, you can call printf with its format
1878 :     string, but you cannot pass additional arguments.)
1879 :    
1880 :     This behavior is only marginally more useful than the one before, but
1881 :     it has the advantage that a function or, more importantly, a function
1882 :     type never gets dropped on the floor, thus avoiding follow-up problems with
1883 :     other types that refer to the offending one.
1884 :    
1885 :     ----------------------------------------------------------------------
1886 :     Name: Matthias Blume
1887 : blume 873 Date: 2001/07/09 11:25:00 EDT
1888 :     Tag: blume-20010709-varargs
1889 :     Description:
1890 :    
1891 :     1. ckit-lib.cm now exports structure Error
1892 :     2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
1893 :     with a warning accompanied by a source location. Moreover, it
1894 :     merely skips the offending function or type and proceeds with the
1895 :     rest of its work.u As a result, one can safely feed C code containing
1896 :     "..." to ml-nlffigen.
1897 :     3. There are some internal improvements to CM, providing slightly
1898 :     more general string substitutions in the tools subsystem.
1899 :    
1900 :     ----------------------------------------------------------------------
1901 :     Name: Matthias Blume
1902 : blume 854 Date: 2001/06/27 15:10:00 EDT
1903 :     Tag: blume-20010627-concur
1904 :     Description:
1905 :    
1906 :     Fixed a small bug in CM's handling of parallel compilation.
1907 :     (You could observe the bug by Control-C-interrupting an ordinary
1908 :     CMB.make or CM.stabilize and then attaching some compile servers.
1909 :     The result was that all of a sudden the previously interrupted
1910 :     compilation would continue on its own. This was because of
1911 :     an over-optimization: CM did not bother to clean out certain queues
1912 :     when no servers were attached "anyway", resulting in the contents
1913 :     of these queues to grab control when new servers did get attached.)
1914 :    
1915 :     There is also another minor update to the CM manual.
1916 :    
1917 :     ----------------------------------------------------------------------
1918 :     Name: Matthias Blume
1919 : blume 853 Date: 2001/06/26 16:15:00 EDT
1920 :     Tag: blume-20010626-cmdoc
1921 :     Description:
1922 :    
1923 :     Minor typo fixed in CM manual (syntax diagram for libraries).
1924 :    
1925 :     ----------------------------------------------------------------------
1926 :     Name: Matthias Blume
1927 : blume 852 Date: 2001/06/25 22:55:00 EDT
1928 :     Tag: blume-20010625-x86pc
1929 :     Description:
1930 :    
1931 :     Fixed a nasty bug in the X86 assembly code that caused signal
1932 :     handlers to fail (crash) randomly.
1933 :    
1934 :     ----------------------------------------------------------------------
1935 :     Name: Matthias Blume
1936 : blume 846 Date: 2001/06/25 12:05:00 EDT
1937 :     Tag: blume-20010625-nlffigen
1938 :     Description:
1939 :    
1940 :     This update fixes a number of minor bugs in ml-nlffigen as reported by
1941 :     Nick Carter <nbc@andrew.cmu.edu>.
1942 :    
1943 :     1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
1944 :     2. Default names for generated files are now derived from the name of
1945 :     the C file *without its directory*. In particular, this causes generated
1946 :     files to be placed locally even if the C file is in some system directory.
1947 :     3. Default names for generated signatures and structures are also derived
1948 :     from the C file name without its directory. This avoids silly things
1949 :     like "structure GL/GL".
1950 :     (Other silly names are still possible because ml-nlffigen does not do
1951 : blume 847 a thorough check of whether generated names are legal ML identifiers.
1952 :     When in doubt, use command line arguments to force particular names.)
1953 : blume 846
1954 :     ----------------------------------------------------------------------
1955 :     Name: Matthias Blume
1956 : blume 845 Date: 2001/06/21 12:25:00 EDT
1957 :     Tag: blume-20010621-eXene
1958 :     Description:
1959 :    
1960 :     eXene now compiles and (sort of) works again.
1961 :    
1962 :     The library name (for version > 110.33) is $/eXene.cm.
1963 :    
1964 :     I also added an new example in src/eXene/examples/nbody. See the
1965 :     README file there for details.
1966 :    
1967 :     ----------------------------------------------------------------------
1968 :     Name: Matthias Blume
1969 : blume 844 Date: 2001/06/20 16:40:00 EDT
1970 :     Tag: blume-20010620-cml
1971 :     Description:
1972 :    
1973 :     CML now compiles and works again.
1974 :    
1975 :     Libraries (for version > 110.33):
1976 :    
1977 :     $cml/cml.cm Main CML library.
1978 :     $cml/basis.cm CML's version of $/basis.cm.
1979 :     $cml/cml-internal.cm Internal helper library.
1980 :     $cml/core-cml.cm Internal helper library.
1981 :     $cml-lib/trace-cml.cm Tracing facility.
1982 :     $cml-lib/smlnj-lib.cm CML's version of $/smlnj-lib.cm
1983 :    
1984 :     The installer (config/install.sh) has been taught how to properly
1985 :     install this stuff.
1986 :    
1987 :     ----------------------------------------------------------------------
1988 :     Name: Matthias Blume
1989 : blume 843 Date: 2001/06/19 17:55:00 EDT
1990 :     Tag: blume-20010619-instantiate
1991 :     Description:
1992 :    
1993 :     This un-breaks the fix for bug 1432.
1994 :     (The bug was originally fixed in 110.9 but I broke it again some
1995 :     time after that.)
1996 :    
1997 :     ----------------------------------------------------------------------
1998 :     Name: Matthias Blume
1999 : blume 842 Date: 2001/06/19 17:25:00 EDT
2000 :     Tag: blume-20010619-signals
2001 :     Description:
2002 :    
2003 :     This should (hopefully) fix the long-standing signal handling bug.
2004 :     (The runtime system was constructing a continuation record with an
2005 :     incorrect descriptor which would cause the GC to drop data on the floor...)
2006 :    
2007 :     ----------------------------------------------------------------------
2008 :     Name: Matthias Blume
2009 : blume 840 Date: 2001/06/15 15:05:00 EDT
2010 : blume 841 Tag: blume-20010615-moresparc
2011 :     Description:
2012 :    
2013 :     Here is a short late-hour update related to Sparc c-calls:
2014 :    
2015 :     -- made handling of double-word arguments a bit smarter
2016 :    
2017 :     -- instruction selection phase tries to collapse certain clumsily
2018 :     constructed ML-Trees; typical example:
2019 :    
2020 :     ADD(ty,ADD(_,e,LI d1),LI d2) -> ADD(ty,e,LI(d1+d2))
2021 :    
2022 :     This currently has no further impact on SML/NJ since mlriscGen does
2023 :     not seem to generate such patterns in the first place, and c-calls
2024 :     (which did generate them in the beginning) has meanwhile been fixed
2025 :     so as to avoid them as well.
2026 :    
2027 :     ----------------------------------------------------------------------
2028 :     Name: Matthias Blume
2029 :     Date: 2001/06/15 15:05:00 EDT
2030 : blume 840 Tag: blume-20010615-sparc
2031 :     Description:
2032 :    
2033 :     The purpose of this update is to provide an implementation of NLFFI
2034 :     on Sparc machines.
2035 :    
2036 :     Here are the changes in detail:
2037 :    
2038 :     * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
2039 :     the Sparc implementation of the c-calls API.
2040 :     * The Sparc backend of SML/NJ has been modified to uniformely use %fp
2041 :     for accessing the ML frame. Thus, we have a real frame pointer and
2042 :     can freely modify %sp without need for an omit-frame-ptr phase.
2043 :     The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
2044 :     this case.
2045 :     * ml-nlffigen has been taught to produce code for different architectures
2046 :     and calling conventions.
2047 :     * In a way similar to what was done in the x86 case, the Sparc
2048 :     backend uses its own specific extension to mltree. (For example,
2049 :     it needs to be able to generate UNIMP instructions which are part
2050 :     of the calling convention.)
2051 :     * ml-nlffi-lib was reorganized to make it more modular (in particular,
2052 :     to make it easier to plug in new machine- and os-dependent parts).
2053 :    
2054 :     There are some other fairly unrelated bug fixes and cleanups as well:
2055 :    
2056 :     * I further hacked the .cm files for MLRISC tools (like MDLGen) so
2057 :     that they properly share their libraries with existing SML/NJ libraries.
2058 :     * I fixed a minor cosmetic bug in CM, supressing certain spurious
2059 :     follow-up error messages.
2060 :     * Updates to CM/CMB documentation.
2061 :    
2062 :     TODO items:
2063 :    
2064 :     * MLRISC should use a different register as its asmTemp on the Sparc.
2065 :     (The current %o2 is a really bad choice because it is part of the
2066 :     calling conventions, so things might interfere in unexpected ways.)
2067 :    
2068 :     ----------------------------------------------------------------------
2069 :     Name: Matthias Blume
2070 : blume 839 Date: 2001/06/07
2071 :     Tag: blume-20010607-calls
2072 :     Description:
2073 :    
2074 :     A number of internal changes related to C calls and calling conventions:
2075 :    
2076 :     1. ML-Tree CALL statements now carry a "pops" field. It indicates the
2077 :     number of bytes popped implicitly (by the callee). In most cases
2078 :     this field is 0 but on x86/win32 it is some non-zero value. This
2079 :     is information provided for the benefit of the "omit-frameptr" pass.
2080 :     2. The CALL instruction on the x86 carries a similar "pops" field.
2081 :     The instruction selection phase copies its value from the ML-Tree
2082 :     CALL statement.
2083 :     3. On all other architectures, the instruction selection phase checks
2084 :     whether "pops=0" and complains if not.
2085 :     4. The c-calls implementation for x86 now accepts two calling conventions:
2086 :     "ccall" and "stdcall". When "ccall" is selected, the caller cleans
2087 :     up after the call and pops is set to 0. For "stdcall", the caller
2088 :     does nothing, leaving the cleanup to the callee; pops is set to
2089 :     the number of bytes that were pushed onto the stack.
2090 :     5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
2091 :     distinguish between "ccall" and "stdcall".
2092 :     6. The UNIMP instruction has been added to the supported Sparc instruction
2093 :     set. (This is needed for implementing the official C calling convention
2094 :     on this architecture.)
2095 :     7. I fixed some of the .cm files under src/MLRISC/Tools to make them
2096 :     work with the latest CM.
2097 :    
2098 :     ----------------------------------------------------------------------
2099 :     Name: Matthias Blume
2100 : blume 838 Date: 2001/06/05 15:10:00 EDT
2101 :     Tag: blume-20010605-cm-index
2102 :     Description:
2103 :    
2104 :     0. The "lambdasplit" parameter for class "sml" in CM has been documented.
2105 :    
2106 :     1. CM can now generate "index files". These are human-readable files
2107 :     that list on a per-.cm-file basis each toplevel symbol defined or
2108 :     imported. The location of the index file for
2109 :     <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
2110 :     To enable index-file generation, set CM.Control.generate_index to true
2111 :     or export an environment-symbol: export CM_GENERATE_INDEX=true.
2112 :    
2113 :     The CM manual has been updated accordingly.
2114 :    
2115 :     2. I made some slight modifications to the c-calls API in MLRISC.
2116 :    
2117 :     a) There is now a callback to support saving/restoring of
2118 :     dedicated but caller-save registers around the actual call
2119 :     instruction.
2120 :     b) One can optionally specify a comment-annotation for the
2121 :     call instruction.
2122 :    
2123 :     3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
2124 :     (For example, the comment annotation shows the C prototype of
2125 :     the function being called.)
2126 :    
2127 :     ----------------------------------------------------------------------
2128 :     Name: Matthias Blume
2129 : blume 837 Date: 2001/06/01 13:30:00 EDT
2130 :     Tag: blume-20010601-nlffi-cleanup
2131 :     Description:
2132 :    
2133 :     This is mostly a cleanup of MLFFI stuff:
2134 :    
2135 :     - some signature files have been put into a more exposed place
2136 :     - the ugly 'f type parameter is gone (simplifies types tremendously!)
2137 :     - ml-nlffigen changed accordingly
2138 :     - tutorial updated
2139 :    
2140 :     Other changes:
2141 :    
2142 :     - author's affiliation in CM manual(s) updated
2143 :     - some more recognized keywords added to Allen's sml.sty
2144 :    
2145 :     ----------------------------------------------------------------------
2146 :     Name: Matthias Blume
2147 : blume 836 Date: 2001/05/25 15:30:00 EDT
2148 :     Tag: blume-20010525-iptr
2149 :     Description:
2150 :    
2151 :     - put the official 110.33-README (as it appears on the ftp server) under
2152 :     CVS
2153 :     - fixed a small bug related to incomplete pointer types in
2154 :     ml-nlffigen
2155 :     - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
2156 :     (it does not need the 'f type parameter)
2157 :    
2158 :     ----------------------------------------------------------------------
2159 :     Name: Matthias Blume
2160 : blume 834 Date: 2001/05/23 14:30:00 EDT
2161 :     Tag: Release_110_33
2162 :     Description:
2163 :    
2164 :     New version number (110.33). New bootfiles.
2165 :    
2166 :     ----------------------------------------------------------------------
2167 :     Name: Matthias Blume
2168 : blume 833 Date: 2001/05/22 18:06:00 EDT
2169 :     Tag: blume-20010522-targets
2170 :     Description:
2171 :    
2172 :     Made install.sh use file config/targets.customized if it exists, falling
2173 :     back to config/targets if it doesn't. This way one can have a customized
2174 :     version of the targets file without touching the "real thing", thus
2175 :     eliminating the constant fear of accidentally checking something bogus
2176 :     back into the CVS repository... (File config/targets.customized must
2177 :     not be added to the repository!)
2178 :    
2179 :     ----------------------------------------------------------------------
2180 :     Name: Matthias Blume
2181 : blume 832 Date: 2001/05/22 16:30:00 EDT
2182 :     Tag: blume-20010522-minitut
2183 :     Description:
2184 :    
2185 :     1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
2186 :     struct returns.
2187 :     2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt. This is some very
2188 :     incomplete, preliminary documentation for NLFFI.
2189 :    
2190 :     ----------------------------------------------------------------------
2191 :     Name: Matthias Blume
2192 : blume 829 Date: 2001/05/14 11:30:00 EDT
2193 :     Tag: blume-20010514-script
2194 :     Description:
2195 :    
2196 :     Some bugs in install script fixed.
2197 :    
2198 :     In addition to that I also made a slight change to the NLFFI API:
2199 :     Functors generated by ml-nlffigen now take the dynamic library as a
2200 :     straight functor argument, not as a suspended one. (The original
2201 :     functor code used to force the suspension right away anyway, so there
2202 :     was nothing gained by this complication of the interface.)
2203 :    
2204 :     ----------------------------------------------------------------------
2205 :     Name: Matthias Blume
2206 : blume 828 Date: 2001/05/11 14:35:00 EDT
2207 :     Tag: blume-20010511-ml-nlffi
2208 :     Description:
2209 :    
2210 :     I finally took the plunge and added my new FFI code to the main
2211 :     repository. For x86-linux it is now ready for prime-time.
2212 :    
2213 :     There are two new subdirectories of "src":
2214 :    
2215 :     - ml-nlffi-lib:
2216 :     The utility library for programs using the FFI interface.
2217 :     Here is the implementation of $/c.cm and its associated low-level
2218 :     partners $/c-int.cm and $/memory.cm.
2219 :     - ml-nlffigen:
2220 :     A stand-alone program for generating ML glue code from C source
2221 :     code.
2222 :    
2223 :     Building ml-nlffigen requires $/ckit-lib.cm.
2224 :    
2225 :     The config/install.sh script has been updates to do the Right Thing
2226 :     (hopefully).
2227 :    
2228 :     Notice that the source tree for the C-Kit will not be put under "src"
2229 :     but directly under the installation root directory. (This is the
2230 :     structure that currently exists on the CVS server when you check out
2231 :     module "sml".) Fortunately, config/install.sh knows about this oddity.
2232 :    
2233 :     Bugs: No documentation yet.
2234 :    
2235 :     ----------------------------------------------------------------------
2236 :     Name: Matthias Blume
2237 : blume 826 Date: 2001/05/09 16:35:00 EDT
2238 :     Tag: blume-20010509-cpscontract
2239 :     Description:
2240 :    
2241 :     Fixed a bug in the accounting code in cpsopt/contract.sml. (The
2242 :     wrapper/unwrapper elimination did not decrement usage counts and some
2243 :     dead variables got overlooked by the dead-up logic.)
2244 :    
2245 :     ----------------------------------------------------------------------
2246 : george 824 Name: Lal George
2247 :     Date: 2001/05/08 17:26:09 EDT
2248 :     Tag: george-20010508-omit-frameptr
2249 :     Description:
2250 :    
2251 :     Changes to implement the omit-frame-pointer optimization to support
2252 :     raw C calls. For now, there is only support on the Intel x86, but
2253 :     other architectures will follow as more experience is gained with this.
2254 :    
2255 :    
2256 :     ----------------------------------------------------------------------
2257 : blume 818 Name: Matthias Blume
2258 : blume 819 Date: 2001/05/07 14:40:00 EDT
2259 :     Tag: blume-20010507-proxies
2260 :     Description:
2261 :    
2262 :     I made into "proxy libraries" all libraries that qualify for such a
2263 :     change. (A qualifying library is a library that has another library or
2264 :     groups as its sole member and repeats that member's export list
2265 :     verbatim. A proxy library avoids this repetition by omitting its export
2266 :     list, effectively inheriting the list that its (only) member exports.
2267 :     See the CM manual for more explanation.)
2268 :     The main effect is that explicit export lists for these libraries
2269 :     do not have to be kepts in sync, making maintenance a bit easier.
2270 :    
2271 :     I also added copyright notices to many .cm-files.
2272 :    
2273 :     Last but not least, I made a new set of bootfiles.
2274 :    
2275 :     ----------------------------------------------------------------------
2276 :     Name: Matthias Blume
2277 : blume 818 Date: 2001/05/04 17:00:00 EDT
2278 :     Tag: blume-20010504-cm-lsplit
2279 :     Description:
2280 :    
2281 :     0. John merged pending changes to $/smlnj-lib.cm
2282 :    
2283 :     1. Allen's previous change accidentally backed out of one of Lal's
2284 :     earlier changes. I undid this mistake (re-introducing Lal's change).
2285 :    
2286 :     2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
2287 :     within the compiler where applicable. There is some code simplification
2288 :     because of that.
2289 :    
2290 :     3. The "split" phase (in FLINT) is now part of the default list of phases.
2291 :     Compiler.Control.LambdaSplitting.* can be used to globally control the
2292 :     lambda-splitting (cross-module-inlining) engine. In addition to that,
2293 :     it can now also be controlled on a per-source basis: CM has been taught
2294 :     a new tool parameter applicable to ML source files.
2295 :    
2296 :     - To turn lambda-splitting off completely:
2297 :     local open Compiler.Control.LambdaSplitting in
2298 :     val _ = set Off
2299 :     end
2300 :     - To make "no lambda-splitting" the global default (but allow per-source
2301 :     overriding); this is the initial setting:
2302 :     local open Compiler.Control.LambdaSplitting in
2303 :     val _ = set (Default NONE)
2304 :     end
2305 :     - To make "lambda-splitting with aggressiveness a" the global default
2306 :     (and allow per-source overriding):
2307 :     local open Compiler.Control.LambdaSplitting in
2308 :     val _ = set (Default (SOME a))
2309 :     end
2310 :    
2311 :     - To turn lambda-splitting off for a given ML souce file (say: a.sml)
2312 :     write (in the respective .cm-file):
2313 :     a.sml (lambdasplitting:off)
2314 :     - To turn lambda-splitting for a.sml on with minimal aggressiveness:
2315 :     a.sml (lambdasplitting:on)
2316 :     - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
2317 :     <a> is a decimal non-negative integer):
2318 :     a.sml (lambdasplitting:<a>)
2319 :     - To turn lambda-splitting for a.sml on with maximal aggressiveness:
2320 :     a.sml (lambdasplitting:infinity)
2321 :     - To use the global default for a.sml:
2322 :     a.sml (lambdasplitting:default)
2323 :     or simply
2324 :     a.sml
2325 :    
2326 :     ----------------------------------------------------------------------
2327 : leunga 815 Name: Allen Leung
2328 :     Date: 2001/05/04 01:57:00 EDT
2329 :     Tag: leunga-20010504-sync
2330 :     Description:
2331 : leunga 788
2332 : leunga 815 MLRISC features.
2333 :    
2334 :     1. Fix to CMPXCHG instructions.
2335 :     2. Changed RA interface to allow annotations in callbacks.
2336 :     3. Added a new method to the stream interface to allow annotations updates.
2337 :    
2338 : george 749 ----------------------------------------------------------------------
2339 : blume 812 Name: Matthias Blume
2340 : blume 814 Date: 2001/05/01 11:45:00 EDT
2341 :     Tag: blume-20010501-pcedittmp
2342 :     Description:
2343 :    
2344 :     Changed install.sh to use the current working directory instead of
2345 :     /usr/tmp for a temporary file (pcedittmp). The previous choice
2346 :     of /usr/tmp caused trouble with MacOS X because of file premission
2347 :     problems.
2348 :    
2349 :     ----------------------------------------------------------------------
2350 :     Name: Matthias Blume
2351 : blume 812 Date: 2001/04/20 11:10:00 EDT
2352 :     Tag: blume-20010420-inMLflag
2353 :     Description:
2354 :    
2355 :     - added vp_limitPtrMask to vproc-state.h
2356 :     (for use by the raw-C-calls mechanism to implement proper interrupt
2357 :     handling)
2358 :     - made the ML compiler aware of various data-structure offsets so it
2359 :     can generate code for accessing the vp_inML flag and vp_limitPtrMask
2360 :     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
2361 :     raw C-calls
2362 :    
2363 :     ----------------------------------------------------------------------
2364 : george 810 Name: Lal George
2365 :     Date: 2001/04/20 09:15:28 EDT
2366 :     Tag: george-20010420-macosX
2367 :     Description:
2368 :    
2369 :     - Changes to port to Mac OS X; Darwin.
2370 :    
2371 :     - In the process I found that sqrt was broken on the PPC, because the
2372 :     fsqrt instruction is not implemented.
2373 :    
2374 :     ----------------------------------------------------------------------
2375 : blume 799 Name: Matthias Blume
2376 : blume 808 Date: 2001/04/18 12:45:00 EDT
2377 :     Tag: blume-20010418-ccalls
2378 :     Description:
2379 :    
2380 :     - fixed two off-by-4 errors in the x86-specific c-calls implementation
2381 :     (this bug prevented structure arguments containing pointers from being
2382 :     passed correctly)
2383 :     - changed the raw-C-call code in mlriscGen.sml in such a way that
2384 :     structure arguments are represented as a pointer to the beginning
2385 :     of the structure (instead of having a series of synthesized arguments,
2386 :     one for each structure member)
2387 :    
2388 :     - made makeml script's verbosity level configurable via environment
2389 :     variable (MAKEML_VERBOSITY)
2390 :    
2391 : blume 813 - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
2392 : blume 808 in rawmem-x86.sml; we are now using the real thing
2393 :    
2394 :     ----------------------------------------------------------------------
2395 :     Name: Matthias Blume
2396 : blume 806 Date: 2001/03/22 16:25:00 EST
2397 :     Tag: blume-20010322-bootfiles
2398 :     Description:
2399 :    
2400 :     Created a new set of bootfiles (for your automatic installation convenience).
2401 :    
2402 :     ----------------------------------------------------------------------
2403 :     Name: Matthias Blume
2404 : blume 805 Date: 2001/03/22 15:10:00 EST
2405 :     Tag: blume-20010322-rawmem-parcm
2406 :     Description:
2407 :    
2408 :     1. All "raw memory access" primitives for the new FFI are implemented now
2409 :     (at least on the x86).
2410 :     2. Some further cleanup of CM's parallel make mechanism.
2411 :    
2412 :     ----------------------------------------------------------------------
2413 :     Name: Matthias Blume
2414 : blume 801 Date: 2001/03/19 17:53:00 EST
2415 :     Tag: blume-20010319-parallel
2416 :     Description:
2417 :    
2418 :     Parallel make (using compile servers) now works again.
2419 :    
2420 :     To this end, CM.stabilize and CMB.make have been modified to work in
2421 :     two passes when compile servers are attached:
2422 :     1. Compile everything, do not perform stabilization; this pass
2423 :     uses compile servers
2424 :     2. Stabilize everything; this pass does not use compile servers
2425 :     If there are no compile servers, the two passes are combined into one
2426 :     (as before). Splitting the passes increases the inherent parallelism
2427 :     in the dependency graph because the entire graph including all
2428 :     libraries is available at the same time. This, in turn, improves
2429 :     server utilization. The downside is that the master process will
2430 :     have to do some extra work after compilation is done (because for
2431 :     technical reasons it must re-read all the binfiles during stabilization).
2432 :    
2433 :     ----------------------------------------------------------------------
2434 :     Name: Matthias Blume
2435 : blume 800 Date: 2001/03/16 12:22:00 EST
2436 :     Tag: blume-20010316-bootfiles
2437 :     Description:
2438 :    
2439 :     Created a new set of bootfiles (for your automatic installation convenience).
2440 :    
2441 :     ----------------------------------------------------------------------
2442 :     Name: Matthias Blume
2443 : blume 799 Date: 2001/03/16 11:00:00 EST
2444 :     Tag: blume-20010316-MLTREE-fixup
2445 :     Description:
2446 :    
2447 :     This is a minor fixup for an (untagged) earlier commit by Allen.
2448 :     (A file was missing).
2449 :    
2450 :     ----------------------------------------------------------------------
2451 : leunga 788 Name: Allen Leung
2452 : leunga 796 Date: Mon Mar 5 18:54:57 EST 2001
2453 :     Tag: leunga-20010305-cut-support
2454 :    
2455 :     1. New support for alternative control-flow in MLTREE.
2456 :     Currently we support
2457 :    
2458 :     FLOW_TO(CALL ...., [k1,...,kn])
2459 :    
2460 :     This is needed for 'cuts to' in C-- and try/handle-like constructs
2461 :     in Moby
2462 :    
2463 :     New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
2464 :    
2465 :     2. Register Allocator
2466 :    
2467 :     Changes in interface [from Fermin, John]
2468 :    
2469 :     3. Alpha 8-bit SLL support [Fermin]
2470 :    
2471 :     4. All architectures
2472 :    
2473 :     A new module (ClusterExpandCopies) for expanding parallel copies.
2474 :    
2475 :     ----------------------------------------------------------------------
2476 :     Name: Allen Leung
2477 : leunga 788 Date: 2001/02/27 23:07:00 EST
2478 :     Tag: leunga-20010227-minor-stuff
2479 :    
2480 :     1. Alpha bug fix for CMOVNE
2481 :     2. Handle mltree COND(..,FCMP ...,...)
2482 :     3. Bug fix in simplifier
2483 :    
2484 :     ----------------------------------------------------------------------
2485 : blume 777 Name: Matthias Blume
2486 : blume 781 Date: 2001/01/30 17:50:00 EST
2487 :     Tag: blume-20010130-sync
2488 :     Description:
2489 :    
2490 :     This is just a minor update to sync my devel branch with the main brach.
2491 :     The only visible change is the addition of some README files.
2492 :    
2493 :     ----------------------------------------------------------------------
2494 :     Name: Matthias Blume
2495 : blume 778 Date: 2001/01/12 23:30:00 JST
2496 :     Tag: blume-20010112-bootfiles
2497 :     Description:
2498 :    
2499 :     Made a new set of bootfiles that goes with the current state of the
2500 :     repository.
2501 :    
2502 :     ----------------------------------------------------------------------
2503 :     Name: Matthias Blume
2504 : blume 777 Date: 2001/01/12 21:20:00 JST
2505 :     Tag: blume-20010112-sync
2506 :     Description:
2507 :    
2508 :     I am just flushing out some minor changes that had accumulated in
2509 :     my private branch in order to sync with the main tree. (This is
2510 :     mainly because I had CVS trouble when trying to merge _into_ my
2511 :     private branch.)
2512 :    
2513 :     Most people should be completely unaffected by this.
2514 :    
2515 :     ----------------------------------------------------------------------
2516 : leunga 775 Name: Allen Leung
2517 :     Date: Thu Jan 11 21:03:00 EST 2001
2518 :     Tag: leunga-20010111-labexp=mltree
2519 :     Description:
2520 :    
2521 :     1. Removed the type LabelExp and replace it by MLTree.
2522 :     2. Rewritten mltree-simplify with the pattern matcher tool.
2523 :     3. There were some bugs in alpha code generator which would break
2524 :     64-bit code generation.
2525 :     4. Redo the tools to generate code with the
2526 :     5. The CM files in MLRISC (and in src/system/smlnj/MLRISC)
2527 :     are now generated by perl scripts.
2528 :    
2529 :     ----------------------------------------------------------------------
2530 : blume 771 Name: Matthias Blume
2531 : blume 774 Date: 2001/01/10 21:55:00 JST
2532 :     Tag: blume-20010110-rcc
2533 :     Description:
2534 :    
2535 :     The RCC stuff now seems to work (but only on the x86).
2536 :     This required hacking of the c-calls interface (and -implementation) in
2537 :     MLRISC.
2538 :    
2539 :     Normal compiler users should be unaffected.
2540 :    
2541 :     ----------------------------------------------------------------------
2542 :     Name: Matthias Blume
2543 : blume 773 Date: 2001/01/09 01:20:00 JST
2544 :     Tag: blume-20010109-rcc
2545 :     Description:
2546 :    
2547 :     This is a fairly big patch, flushing out a large number of pending
2548 :     changes that I made to my development copy over the last couple of days.
2549 :    
2550 :     Of practical relevance at this moment is a workaround for a pickling
2551 :     bug that Allen ran into the other day. The cause of the bug itself is
2552 :     still unknown and it might be hard to fix it properly, but the
2553 :     workaround has some merits of its own (namely somewhat reducing pickling
2554 :     overhead for certain libraries). Therefore, I think this solution should
2555 :     be satisfactory at this time.
2556 :    
2557 :     The rest of the changes (i.e., the vast majority) has to do with my
2558 :     ongoing efforts of providing direct support for C function calls from
2559 :     ML. At the moment there is a new primop "RAW_CCALL", typing magic
2560 :     in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
2561 :     case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
2562 :     translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
2563 :     handle RCC.
2564 :    
2565 :     The last part (the changes to mlriscGen.sml) are still known to be
2566 :     wrong on the x86 and not implemented on all other architectures. But
2567 :     the infrastructure is in place. I had to change a few functor
2568 :     signatures in the backend to be able to route the CCalls interface
2569 :     from MLRISC there, and I had to specialize the mltree type (on the
2570 :     x86) to include the necessary extensions. (The extensions themselves
2571 :     were already there and redy to go in MLRISC/x86).
2572 :    
2573 :     Everything should be very happy as soon as someone helps me with
2574 :     mlriscGen.sml...
2575 :    
2576 :     In any case, nothing of this should matter to anyone as long as the
2577 :     new primop is not being used (which is going to be the case unless you
2578 :     find it where I hid it :). The rest of the compiler is completely
2579 :     unaffected.
2580 :    
2581 :     ----------------------------------------------------------------------
2582 :     Name: Matthias Blume
2583 : blume 772 Date: 2001/01/05 00:30:00 JST
2584 :     Tag: blume-20010105-primops
2585 :     Description:
2586 :    
2587 :     Added some experimental support for work that I am doing right now.
2588 :     These changes mostly concern added primops, but there is also a new
2589 :     experimental C library in the runtime system (but currently not enabled
2590 :     anywhere except on Linux/X86).
2591 :    
2592 :     In the course of adding primops (and playing with them), I discovered that
2593 :     Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
2594 :     broken. (Zhong was very right he labeled this stuff as "major gross hack".)
2595 :     To recover, I made type information in INL_PRIM mandatory and changed
2596 :     prim.sml as well as built-in.sml accordingly. The InLine structure now
2597 :     has complete, correct type information (i.e., no bottom types).
2598 :    
2599 :     Since all these changes mean that we need new binfiles, I also bumped the
2600 :     version number to 110.32.1.
2601 :    
2602 :     ----------------------------------------------------------------------
2603 :     Name: Matthias Blume
2604 : blume 771 Date: 2000/12/30 22:10:00 JST
2605 :     Tag: blume-20001230-various
2606 :     Description:
2607 :    
2608 :     Added proxy libraries for MLRISC and let MLRISC libraries refer
2609 :     to each other using path anchors. (See CM manual for explanation.)
2610 :    
2611 :     Updated CM documentation.
2612 :    
2613 :     Fixed some bugs in CM.
2614 :    
2615 :     Implemented "proxy" libraries (= syntactic sugar for CM).
2616 :    
2617 :     Added "-quiet" option to makeml and changed runtime system accordingly.
2618 :    
2619 :     Added cleanup handler for exportML to reset timers and compiler stats.
2620 :    
2621 :     ----------------------------------------------------------------------
2622 : george 761 Name: Lal George
2623 :     Date: 2000/12/22 22:22:58 EST 2000
2624 :     Tag: Release_110_32
2625 :     Description:
2626 :    
2627 :     Infinite precision used throughout MLRISC.
2628 :     see MLRISC/mltree/machine-int.sig
2629 :    
2630 :     ----------------------------------------------------------------------
2631 : blume 756 Name: Matthias Blume
2632 : blume 760 Date: 2000/12/22 23:16:00 JST
2633 :     Tag: blume-20001222-warn
2634 :     Description:
2635 : blume 759
2636 : blume 760 Corrected wording and formatting of some CM warning message which I
2637 :     broke in my previous patch.
2638 : blume 759
2639 :     ----------------------------------------------------------------------
2640 :     Name: Matthias Blume
2641 : blume 763 Date: 2000/12/22 21:20:00 JST
2642 :     Tag: blume-20001222-anchorenv
2643 :     Description:
2644 :    
2645 :     Fixed CM's handling of anchor environments in connection with CMB.make.
2646 :    
2647 :     ----------------------------------------------------------------------
2648 :     Name: Matthias Blume
2649 : blume 758 Date: 2000/12/22 13:15:00 JST
2650 :     Tag: blume-20001222-cleanup
2651 :     Description:
2652 :    
2653 :     Removed src/cm/ffi which does not (and did not) belong here.
2654 :    
2655 :     ----------------------------------------------------------------------
2656 :     Name: Matthias Blume
2657 : blume 757 Date: 2000/12/21 23:55:00 JST
2658 :     Tag: blume-20001221-exn
2659 :     Description:
2660 :    
2661 :     Probably most important: CM no longer silently swallows all exceptions
2662 :     in the compiler.
2663 :     Plus: some other minor CM changes. For example, CM now reports some
2664 :     sizes for generated binfiles (code, data, envpickle, lambdapickle).
2665 :    
2666 :     ----------------------------------------------------------------------
2667 :     Name: Matthias Blume
2668 : blume 756 Date: 2000/12/15 00:01:05 JST
2669 :     Tag: blume-20001215-dirtool
2670 :     Description:
2671 :    
2672 :     - "dir" tool added.
2673 :     - improvements and cleanup to Tools structure
2674 :     - documentation updates
2675 :    
2676 :     ----------------------------------------------------------------------
2677 : leunga 752 Name: Allen Leung
2678 : leunga 755 Date: Thu Dec 14 03:45:24 EST 2000
2679 :     Description:
2680 :     Tag: leunga-20001214-int-inf
2681 :     Description:
2682 :    
2683 :     In IntInf, added these standard functions, which are missing from our
2684 :     implementation:
2685 :    
2686 :     andb : int * int -> int
2687 :     xorb : int * int -> int
2688 :     orb : int * int -> int
2689 :     notb : int -> int
2690 :     << : int * word -> int
2691 :     ~>> : int * word -> int
2692 :    
2693 :     Not tested, I hope they are correct.
2694 :    
2695 :     ----------------------------------------------------------------------
2696 :     Name: Allen Leung
2697 : leunga 752 Date: Fri Dec 8 19:23:26 EST 2000
2698 :     Description:
2699 :     Tag: leunga-20001208-nowhere
2700 :     Description:
2701 :    
2702 :     Slight improvements to the 'nowhere' tool to handle OR-patterns,
2703 :     to generate better error messages etc. Plus a brief manual.
2704 :    
2705 :     ----------------------------------------------------------------------
2706 : george 749 Name: Lal George
2707 :     Date: 2000/12/08 09:54:02 EST 2000
2708 :     Tag: Release_110_31
2709 :     Description:
2710 : george 705
2711 : george 749 - Version 110.31
2712 : leunga 591 ----------------------------------------------------------------------
2713 : leunga 744 Name: Allen Leung
2714 :     Date: Thu Dec 7 22:01:04 EST 2000
2715 :     Tag: leunga-20001207-cell-monster-hack
2716 :     Description:
2717 :    
2718 :     Major MLRISC internal changes. Affect all clients.
2719 :     Summary:
2720 :    
2721 :     1. Type CELLS.cell = int is now replaced by a datatype.
2722 :     As a result, the old regmap is now gone. Almost all interfaces
2723 :     in MLRISC change as a consequence.
2724 :    
2725 :     2. A new brand version of machine description tool (v3.0) that generates
2726 :     modules expecting the new interface. The old version is removed.
2727 :    
2728 :     3. The RA interface has been further abstracted into two new functors.
2729 :     RISC_RA and X86RA. These functors have much simpler interfaces.
2730 :     [See also directory MLRISC/demo.]
2731 :    
2732 :     4. Some other new source->source code generation tools are available:
2733 :    
2734 :     a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
2735 :     b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
2736 :     I use this tool to generate the peephole optimizers---with the new
2737 :     cell type changes, peephole rules are becoming difficult to write
2738 :     without conditional pattern matching.
2739 :    
2740 :     5. More Intmap -> IntHashTable change. Previous changes by Matthias didn't
2741 :     cover the entire MLRISC source tree so many things broke.
2742 :    
2743 :     6. CM files have been moved to the subdirectory MLRISC/cm.
2744 :     They are moved because there are a lot of them and they clutter up the
2745 :     root dir.
2746 :    
2747 :     7. More detailed documentation to come...
2748 :    
2749 :     NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
2750 :     a makeml -rebuild first. This is because of other other
2751 :     changes that Matthias has made (see below).
2752 :    
2753 :    
2754 :     ----------------------------------------------------------------------
2755 : blume 733 Name: Matthias Blume
2756 : blume 742 Date: 2000/11/30 23:12:00 JST
2757 :     Tag: blume-20001130-filereorg
2758 :     Description:
2759 :    
2760 :     Some manual updates and some file reorganizations in CM.
2761 :    
2762 :     ----------------------------------------------------------------------
2763 :     Name: Matthias Blume
2764 : blume 737 Date: 2000/11/24 17:45:00 JST
2765 :     Tag: blume-20001124-link
2766 :     Description:
2767 :    
2768 :     Drastically improved link traversal code for the case that the dynamic
2769 :     value was already loaded at bootstrap time. As a result, CM and CMB
2770 :     now both load blazingly fast -- even on a very slow machine. Also,
2771 :     memory consumption has been further reduced by this.
2772 :    
2773 :     Warning: The format of the PIDMAP file has changed. THerefore, to
2774 :     bootstrap you have to do this:
2775 :    
2776 :     1. Run CMB.make
2777 :     2. Make a symbolic link for the boot directory:
2778 :     ln -s sml.boot.ARCH-OS xxx
2779 :     3. "Rebuild" the boot directory:
2780 :     ./makeml -boot xxx -rebuild sml ; rm xxx
2781 :     4. Boot normally:
2782 :     ./makeml
2783 :    
2784 :     ----------------------------------------------------------------------
2785 :     Name: Matthias Blume
2786 : blume 735 Date: 2000/11/21 21:20:00 JST
2787 :     Tag: blume-20001121-tools
2788 :     Description:
2789 :    
2790 :     Continued hacking on autoloading problem -- with success this time.
2791 :     Also changed tool-plugin mechanism. See new CM manual.
2792 :    
2793 :     ----------------------------------------------------------------------
2794 :     Name: Matthias Blume
2795 : blume 734 Date: 2000/11/19 14:30:00 JST
2796 :     Tag: blume-20001119-autoload
2797 :     Description:
2798 :    
2799 :     Some hacking to make autoloading faster. Success for CMB, no success
2800 :     so far for CM. There is a reduced structure CM' that autoloads faster.
2801 :     (This is a temporary, non-documented hack to be eliminated again when
2802 :     the general problem is solved.)
2803 :    
2804 :     ----------------------------------------------------------------------
2805 :     Name: Matthias Blume
2806 : blume 733 Date: 2000/11/17 14:10:00 JST
2807 :     Tag: blume-20001117-pickle-lib
2808 :     Description:
2809 :    
2810 :     1. Eliminated comp-lib.cm
2811 :     2. Made pickle-lib.cm
2812 :     3. Eliminated all uses of intset.sml (from comp-lib.cm)
2813 :     4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
2814 :     equivalent constructs from smlnj-lib.cm (INtHashTable).
2815 :     5. Point 4. also goes for those uses of intmap.* in MLRISC.
2816 :     Duplicated intmap modules thrown out.
2817 :     6. Hunted down all duplicated SCC code and replaced it with
2818 :     equivalent stuff (GraphSCCFn from smlnj-lib.cm).
2819 :     7. Rewrote Feedback module.
2820 :     8. Moved sortedlist.sml into viscomp-lib.cm. Eventually it
2821 :     should be thrown out and equivalent modules from smlnj-lib.cm
2822 :     should be used (IntRedBlackSet, IntListSet, ...).
2823 :    
2824 :     Confirmed that compiler compiles to fixpoint.
2825 :    
2826 :     ----------------------------------------------------------------------
2827 : leunga 731 Name: Allen Leung
2828 :     Date: 2000/11/10 18:00:00
2829 :     Tag: leunga-20001110-new-x86-fp
2830 :    
2831 :     A new x86 floating point code generator has been added.
2832 :     By default this is turned off. To turn this on, do:
2833 :    
2834 :     CM.autoload "$smlnj/compiler.cm";
2835 :     Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
2836 :    
2837 :     Changes:
2838 :    
2839 :     1. Changed FTAN to FPTAN so that the assembly output is correct.
2840 :     2. Changed the extension callback for FTANGENT to generate:
2841 :    
2842 :     fptan
2843 :     fstp %st(0)
2844 :     instead of
2845 :     fptan
2846 :     fstpl ftempmem
2847 :    
2848 :     3. Numerous assembly fixes for x86.
2849 :    
2850 :     5. Cleaned up the machine code output module x86/x86MC.sml and added
2851 :     support for a whole bunch of instructions and addressing modes:
2852 :    
2853 :     fadd/fsub/fsubr/fmul/fdiv/fdivr %st, %st(n)
2854 :     faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp %st, %st(n)
2855 :     fadd/fsub/fsubr/fmul/fdiv/fdivr %st(n), %st
2856 :     fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
2857 :     fxch %st(n)
2858 :     fld %st(n)
2859 :     fst %st(n)
2860 :     fst mem
2861 :     fstp %st(n)
2862 :     fucom %st(n)
2863 :     fucomp %st(n)
2864 :    
2865 :     All these are now generated when the fast fp mode is turned on.
2866 :    
2867 :     6. Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
2868 :    
2869 :     ----------------------------------------------------------------------
2870 : blume 729 Name: Matthias Blume
2871 :     Date: 2000/11/09 11:20:00 JST
2872 :     Tag: blume-20001109-scc
2873 :     Description:
2874 :    
2875 :     Eliminated some code duplication:
2876 :    
2877 :     1. Added "where" clause to GraphSCCFn in SML/NJ Library.
2878 :     (Otherwise the functor is useless.)
2879 :     2. Used GraphSCCFn where SCCUtilFun was used previously.
2880 :     3. Got rid of SCCUtilFun (in comp-lib.cm).
2881 :    
2882 :     ----------------------------------------------------------------------
2883 : george 721 Name: Lal George
2884 :     Date: 2000/11/06 09:02:21 EST 2000
2885 :     Tag: Release_110_30
2886 :     Description:
2887 :    
2888 :     - Version 110.30
2889 :     ----------------------------------------------------------------------
2890 : blume 715 Name: Matthias Blume
2891 : blume 716 Date: 2000/11/04 14:45:00
2892 :     Tag: blume-20001104-mlbuild
2893 :     Description:
2894 :    
2895 :     - Made ml-build faster on startup.
2896 :     - Documentation fixes.
2897 :    
2898 :     ----------------------------------------------------------------------
2899 :     Name: Matthias Blume
2900 : blume 715 Date: 2000/11/02 17:00:00 JST
2901 :     Tag: blume-20001102-condcomp
2902 :     Description:
2903 :    
2904 :     - Small tweaks to pickler -- new BOOTFILES!
2905 :     - Version bumped to 110.29.2.
2906 :     - Added conditional compilation facility to init.cmi (see comment there).
2907 :     ----------------------------------------------------------------------
2908 : leunga 713 Name: Allen Leung
2909 :     Date: 2000/10/23 19:31:00
2910 :     Tag: leunga-20001023-demo-ra
2911 :    
2912 :     1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
2913 :     2. Test programs for the graph library updated
2914 :     3. Some new MLRISC demo programs added
2915 :    
2916 :     ----------------------------------------------------------------------
2917 : blume 710 Name: Matthias Blume
2918 : blume 711 Date: 2000/08/31 22:15:00 JST
2919 :     Tag: blume-20001017-errmsg
2920 :     Description:
2921 :    
2922 :     More error message grief: Where there used to be no messages, there
2923 :     now were some that had bogus error regions. Fixed.
2924 :    
2925 :     ----------------------------------------------------------------------
2926 :     Name: Matthias Blume
2927 : blume 710 Date: 2000/08/31 17:30:00 JST
2928 :     Tag: blume-20001017-v110p29p1
2929 :     Description:
2930 :    
2931 :     I made a version 110.29.1 with new bootfiles.
2932 :    
2933 :     Changes: Modified pickler/unpickler for faster and leaner unpickling.
2934 :     CM documentation changes and a small bugfix in CM's error reporting.
2935 :    
2936 :     ----------------------------------------------------------------------
2937 : george 705 Name: Lal George
2938 :     Date: 2000/09/27 14:42:35 EDT
2939 :     Tag: george-20000927-nodestatus
2940 :     Description:
2941 :    
2942 :     Changed the type of the nodestatus, so that:
2943 :    
2944 :     SPILLED(~1) is now SPILLED
2945 :     SPILLED(m) where m>=0 is now MEMREG(m)
2946 :     SPILLED(s) where s<~1 is now SPILL_LOC(~s)
2947 :    
2948 :     ----------------------------------------------------------------------
2949 : blume 697 Name: Matthias Blume
2950 : blume 703 Date: 2000/09/07 14:45:00 JST
2951 :     Tag: blume-20000907-cmerrmsg
2952 :     Description:
2953 :    
2954 :     Small tweak to CM to avoid getting ML syntax error messages twice.
2955 :    
2956 :     ----------------------------------------------------------------------
2957 :     Name: Matthias Blume
2958 : blume 701 Date: 2000/08/31 18:00:00 JST
2959 :     Tag: blume-20000831-cvsbootfiles
2960 :     Description:
2961 :    
2962 :     New URL for boot files (because the 110.29 files on the BL server do
2963 :     now work correctly with my updated install scripts for yacc and lex).
2964 :    
2965 :     ----------------------------------------------------------------------
2966 :     Name: Matthias Blume
2967 : blume 697 Date: 2000/08/08 12:33:00 JST
2968 :     Tag: blume-20000808-manual
2969 :     Description:
2970 :    
2971 :     Tiny update to CM manual.
2972 :    
2973 :     ----------------------------------------------------------------------
2974 : leunga 695 Name: Allen Leung
2975 :     Date: 2000/08/7 19:31:00
2976 :     Tag: leunga-20000807-a-whole-bunch-of-stuff
2977 :    
2978 :     Moby, C--, SSA, x86, machine descriptions etc. Should only affect C--
2979 :     and Mobdy.
2980 :    
2981 :     1. x86
2982 :    
2983 :     a. Fixes to peephole module by John and Dan.
2984 :     b. Assembly fix to SETcc by Allen.
2985 :     c. Fix to c-call by John.
2986 :     d. Fix to spilling by John. (This one deals with the missing FSTPT case)
2987 :     e. Instruction selection optimization to SETcc as suggested by John.
2988 :    
2989 :     For example,
2990 :    
2991 :     MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
2992 :    
2993 :     should generate:
2994 :    
2995 :     MOVL a, x
2996 :     SUBL b, x
2997 :     SHRL 31, x
2998 :    
2999 :     2. IR stuff
3000 :    
3001 :     A bunch of new DJ-graph related algorithms added. These
3002 :     speed up SSA construction.
3003 :    
3004 :     3. SSA + Scheduling
3005 :    
3006 :     Added code for SSA and scheduling to the repository
3007 :    
3008 :     ----------------------------------------------------------------------
3009 : george 694 Name: Lal George
3010 :     Date: 2000/07/27 11:53:14 EDT
3011 :    
3012 :     Tag: lal-20000727-linux-ppc
3013 :     Description:
3014 :    
3015 :     Made changes to support Linux PPC.
3016 :     p.s. I have confirmation that the 110.29 boot files work fine.
3017 :    
3018 :     ----------------------------------------------------------------------
3019 : blume 684 Name: Matthias Blume
3020 : blume 692 Date: 2000/07/27 17:40:00 JST
3021 :     Tag: blume-20000727-scripts
3022 :     Description:
3023 :    
3024 :     !!!! WARNING !!!!
3025 :     You must recompile the runtime system!
3026 :     !!!! WARNING !!!!
3027 :    
3028 :     This is basically another round of script-enhancements:
3029 :    
3030 :     1. sml, ml-build, and ml-makedepend accept options -D and -U to define
3031 :     and undefine CM preprocessor symbols.
3032 :    
3033 :     2. ml-build avoids generating a new heap image if it finds that the
3034 :     existing one is still ok. (The condition is that no ML file had to
3035 :     be recompiled and all ML files are found to be older that the heap
3036 :     file.)
3037 :    
3038 :     To make this work smoothly, I also hacked the runtime system as
3039 :     well as SMLofNJ.SysInfo to get access to the heap image suffix
3040 :     (.sparc-solaris, ...) that is currently being used.
3041 :    
3042 :     Moreover, the signature of CM.mk_standalone has changed. See the
3043 :     CM manual.
3044 :    
3045 :     3. ml-makedepend accepts additional options -n, -a, and -o. (See the
3046 :     CM manual for details.)
3047 :    
3048 :     4. More CM manual updates:
3049 :     - all of the above has been documented.
3050 :     - there is now a section describing the (CM-related) command line
3051 :     arguments that are accepted by the "sml" command
3052 :    
3053 :     ----------------------------------------------------------------------
3054 :     Name: Matthias Blume
3055 : blume 691 Date: 2000/07/25 16:20:00 JST
3056 :     Tag: blume-20000725-makedepend
3057 :     Description:
3058 :    
3059 :     Added a script called ml-makedepend. This can be used in makefiles
3060 :     for Unix' make in a way very similar to the "makedepend" command for
3061 :     C.
3062 :    
3063 :     The script internally uses function CM.sources.
3064 :    
3065 :     Synopsis:
3066 :    
3067 :     ml-makedepend [-f makefile] cmfile targetname
3068 :    
3069 :     The default for the makefile is "makefile" (or "Makefile" should
3070 :     "makefile" not exist).
3071 :    
3072 :     ml-makedepend adds a cmfile/targetname-specific section to this
3073 :     makefile (after removing the previous version of this section). The
3074 :     section contains a single dependency specification with targetname on
3075 :     the LHS (targetname is an arbitrary name), and a list of files derived
3076 :     from the cmfile on the RHS. Some of the files on the RHS are
3077 :     ARCH/OPSYS-specific. Therefore, ml-makedepend inserts references to
3078 :     "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
3079 :     path names. The makefile writer is responsible for making sure that
3080 :     these variables have correct at the time "make" is invoked.
3081 :    
3082 :     ----------------------------------------------------------------------
3083 :     Name: Matthias Blume
3084 : blume 690 Date: 2000/07/22 23:30:00 JST
3085 :     Tag: blume-20000722-urlupdate
3086 :     Description:
3087 :    
3088 :     Changed BOOT and config/srcarchiveurl to point to BL server:
3089 :    
3090 :     ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
3091 :    
3092 :     ----------------------------------------------------------------------
3093 :     Name: Matthias Blume
3094 : blume 686 Date: 2000/07/18 18:00:00 JST
3095 :     Tag: blume-20000718-Version_110_29
3096 :     Description:
3097 :    
3098 :     1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
3099 :    
3100 :     2. Updated config/version to 110.29
3101 :    
3102 :     3. Updated config/srcarchiveurl
3103 :    
3104 :     3. New boot files!
3105 :     ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
3106 :    
3107 :     ----------------------------------------------------------------------
3108 :     Name: Matthias Blume
3109 : blume 684 Date: 2000/07/11 13:58:00 JST
3110 :     Tag: blume-20000711-doctypo
3111 :     Description:
3112 :    
3113 :     Fixed a few typos in CM manual.
3114 :    
3115 :     ----------------------------------------------------------------------
3116 : leunga 683 Name: Allen Leung
3117 :     Date: 2000/06/15 00:38:00
3118 :     Tag: leunga-20000704-sparc-x86
3119 :    
3120 :     1. x86 peephole improvement sp += k; sp -= k => nop [from John]
3121 :     2. fix to x86 RET bug [found by Dan Grossman]
3122 :     3. sparc assembly bug fix for ticc instructions [found by Fermin]
3123 :    
3124 :     Affects c-- and moby only
3125 :    
3126 :     ----------------------------------------------------------------------
3127 : blume 680 Name: Matthias Blume
3128 : blume 682 Date: 2000/07/04 15:26:00
3129 :     Tag: blume-20000704-trigger
3130 :     Description:
3131 :    
3132 :     1. Improvements to CM manual.
3133 :     2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
3134 :     of getting a back-trace. The function, when called, raises an
3135 :     internal exception which explicitly carries the full back-trace history,
3136 :     so it is unaffected by any intervening handle-raise pairs ("trivial"
3137 :     or not). The interactive loop will print that history once it arrives
3138 :     at top level.
3139 :     Short of having all exceptions implicitly carry the full history, the
3140 :     recommended way of using this facility is:
3141 :     - compile your program with instrumentation "on"
3142 :     - run it, when it raises an exception, look at the history
3143 :     - if the history is "cut off" because of some handler, go and modify
3144 :     your program so that it explicitly calls BTrace.trigger
3145 :     - recompile (still instrumented), and rerun; look at the full history
3146 :    
3147 :     ----------------------------------------------------------------------
3148 :     Name: Matthias Blume
3149 :     Date: 2000/07/03 15:36:00 JST
3150 : blume 680 Tag: blume-20000702-manual
3151 :     Description:
3152 :    
3153 :     Small corrections and updates to CM manual.
3154 :    
3155 :     ----------------------------------------------------------------------
3156 : blume 682 Name: Matthias Blume
3157 : blume 679 Date: 2000/06/29 16:04:00 JST
3158 :     Tag: blume-20000629-yacctool
3159 :     Description:
3160 :    
3161 :     Changes:
3162 :    
3163 :     1. Class "mlyacc" now takes separate arguments to pass options to
3164 :     generated .sml- and .sig-files independently.
3165 :     2. Corresponding CM manual updates.
3166 :     3. BTrace module now also reports call sites. (However, for loop clusters
3167 :     it only shows from where the cluster was entered.) There are associated
3168 :     modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
3169 :    
3170 :     ----------------------------------------------------------------------
3171 : blume 675 Name: Matthias Blume
3172 : blume 678 Date: 2000/06/27 16:51:00 JST
3173 :     Tag: blume-20000627-noweb
3174 :     Description:
3175 :    
3176 :     Changes:
3177 :    
3178 :     1. Implemented "subdir" and "witness" options for noweb tool.
3179 :     This caused some slight internal changes in CM's tool implementation.
3180 :     2. Fixed bug in "tool plugin" mechanism. This is essentially cleaning
3181 :     some remaining issues from earlier path anchor changes.
3182 :     3. Updated CM manual accordingly.
3183 :    
3184 :     4. Changed implementation of back-tracing so that I now consider it
3185 :     ready for prime-time.
3186 :    
3187 :     In particular, you don't have to explicitly trigger the back-trace
3188 :     anymore. Instead, if you are running BTrace-instrumented code and
3189 :     there is an uncaught exception (regardless of whether or not it was
3190 :     raised in instrumented code), the top-level evalloop will print
3191 :     the back-trace.
3192 :    
3193 :     Features:
3194 :    
3195 :     - Instrumented and uninstrumented code work together seemlessly.
3196 :     (Of course, uninstrumented code is never mentioned in actual
3197 :     back-traces.)
3198 :    
3199 :     - Asymptotic time- and space-complexity of instrumented code is
3200 :     equal to that of uninstrumented code. (This means that
3201 :     tail-recursion is preserved by the instrumentation phase.)
3202 :    
3203 :     - Modules whose code has been instrumented in different sessions
3204 :     work together without problem.
3205 :    
3206 :     - There is no penalty whatsoever on uninstrumented code.
3207 :    
3208 :     - There is no penalty on "raise" expressions, even in
3209 :     instrumented code.
3210 :    
3211 :     A potential bug (or perhaps it is a feature, too):
3212 :    
3213 :     A back-trace reaches no further than the outermost instrumented
3214 :     non-trivial "raise". Here, a "trivial" raise is one that is the
3215 :     sole RHS of a "handle" rule. Thus, back-traces reach trough
3216 :    
3217 :     <exp> handle e => raise e
3218 :    
3219 :     and even
3220 :    
3221 :     <exp> handle Foo => raise Bar
3222 :    
3223 :     and, of course, through
3224 :    
3225 :     <exp> handle Foo => ...
3226 :    
3227 :     if the exception was not Foo.
3228 :    
3229 :     Back-traces always reach right through any un-instrumented code
3230 :     including any of its "handle" expressions, trivial or not.
3231 :    
3232 :     To try this out, do the following:
3233 :    
3234 :     - Erase all existing binfiles for your program.
3235 :     (You may keep binfiles for those modules where you think you
3236 :     definitely don't need back-tracing.)
3237 :     - Turn on back-trace instrumentation:
3238 :     SMLofNJ.Internals.BTrace.mode (SOME true);
3239 :     - Recompile your program. (I.e., run "CM.make" or "use".)
3240 :     - You may now turn instrumentation off again (if you want):
3241 :     SMLofNJ.Internals.BTrace.mode (SOME false);
3242 :     - Run your program as usual. If it raises an exception that
3243 :     reaches the interactive toplevel, then a back-trace will
3244 :     automatically be printed. After that, the toplevel loop
3245 :     will print the exception history as usual.
3246 :    
3247 :     ----------------------------------------------------------------------
3248 :     Name: Matthias Blume
3249 : blume 677 Date: 2000/06/26 09:56:46 JST
3250 :     Tag: blume-20000626-setup
3251 :     Description:
3252 :    
3253 :     CM: - setup-parameter to "sml" added; this can be used to run arbitrary
3254 :     ML code before and after compiling a file (e.g., to set compiler
3255 :     flags)
3256 :    
3257 :     Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
3258 :     - associated changes to btrace.sml (BTrace instrumentation pass)
3259 :     - cleaner implementation of btimp.sml (BTrace tracing and report
3260 :     module)
3261 :    
3262 :     CM manual: * new path encoding documented
3263 :     * description of setup-parameter to "sml" added
3264 :    
3265 :     The biggest user-visible change to back-tracing is that it is no
3266 :     longer necessary to compile all traced modules within the same
3267 :     session. (This was a real limitation.)
3268 :    
3269 :     ----------------------------------------------------------------------
3270 :     Name: Matthias Blume
3271 : blume 676 Date: 2000/06/24 12:40:00 JST
3272 :     Tag: blume-20000624-startup
3273 :     Description:
3274 :    
3275 :     Fixes startup slowdown problem. (I was calling SrcPath.sync a _tad_
3276 :     bit too often -- to put it mildly. :)
3277 :    
3278 :     ----------------------------------------------------------------------
3279 :     Name: Matthias Blume
3280 : blume 675 Date: 2000/06/23 18:20:00 JST
3281 :     Tag: blume-20000623-btrace
3282 :     Description:
3283 :    
3284 :     This updates adds a backtrace facility to aid programmers in debugging
3285 :     their programs. This involves the following changes:
3286 :    
3287 :     1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
3288 :     keeping track of the current call stack. When programs are compiled
3289 :     in a special mode, the compiler will insert calls to these hooks
3290 :     into the user program.
3291 :     "Hook" means that it is possible for different implementations of
3292 :     back-tracing to register themselves (at different times).
3293 :    
3294 :     2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
3295 :     as an Absyn.dec->Absyn.dec rewrite. Normally this phase is turned off.
3296 :     It can be turned on using this call:
3297 :     SMLofNJ.Internals.BTrace.mode (SOME true);
3298 :     Turning it off again:
3299 :     SMLofNJ.Internals.BTrace.mode (SOME false);
3300 :     Querying the current status:
3301 :     SMLofNJ.Internals.BTrace.mode NONE;
3302 :     Annotated programs are about twice as big as normal ones, and they
3303 :     run a factor of 2 to 4 slower with a dummy back-trace plugin (one
3304 :     where all hooks do nothing). The slowdown with a plugin that is
3305 :     actually useful (such as the one supplied by default) is even greater,
3306 :     but in the case of the default plugin it is still only an constant
3307 :     factor (amortized).
3308 :    
3309 :     3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
3310 :     with a sub-structure BTrace for controlling back-tracing. In particular,
3311 :     the above-mentioned function "mode" controls whether the annotation
3312 :     phase is invoked by the compiler. Another important function is
3313 :     "trigger": when called it aborts the current execution and causes
3314 :     the top-level loop to print a full back-trace.
3315 :    
3316 :     4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
3317 :     for back-tracing. It keeps track of the dynamic call stack and in
3318 :     addition to that it keeps a partial history at each "level" of that
3319 :     stack. For example, if a tail-calls b, b tail-calls c, and c tail-calls
3320 :     d and b (at separate times, dynamically), then the report will show:
3321 :    
3322 :     GOTO d
3323 :     /c
3324 :     GOTO \b
3325 :     CALL a
3326 :    
3327 :     This shows that there was an initial non-tail call of a, then a
3328 :     tail-call to b or c, looping behavior in a cluster of functions that
3329 :     consist of b and c, and then a goto from that cluster (i.e., either from
3330 :     b or from c) to d.
3331 :    
3332 :     Note that (depending on the user program) the amount of information
3333 :     that the back-trace module has to keep track of at each level is bounded
3334 :     by a constant. Thus, the whole implementation has the same asymptotical
3335 :     complexity as the original program (both in space and in time).
3336 :    
3337 :     5. compiler/TopLevel/interact/evalloop.sml has been modified to
3338 :     handle the special exception SMLofNJ.Internals.BTrace.BTrace
3339 :     which is raised by the "trigger" function mentioned above.
3340 :    
3341 :     Notes on usage:
3342 :    
3343 :     - Annotated code works well together with unannotated code:
3344 :     Unannotated calls simply do not show up at all in the backtrace.
3345 :    
3346 :     - It is not a good idea to let modules that were annotated during
3347 :     different sessions run at the same time. This is because the compiler
3348 :     chooses small integers to identify individual functions, and there
3349 :     will be clashes if different modules were compiled in separate sessions.
3350 :     (Nothing will crash, and you will even be told about the clashes, but
3351 :     back-trace information will in general not be useful.)
3352 :    
3353 :     - Back-tracing can be confused by callcc and capture.
3354 :    
3355 :     - The only way of getting a back-trace right now is to explicitly
3356 :     invoke the "trigger" function from your user program. Eventually, we
3357 :     should make every exception carry back-trace information (if
3358 :     available). But since this creates more overhead at "raise"-time
3359 :     (similar to the current exnHistory overhead), I have not yet
3360 :     implemented this. (The implementation will be rather easy.) With
3361 :     exceptions carrying back-trace information, this facility will be even
3362 :     more useful because users don't need to modify their programs...
3363 :    
3364 :     - While it is possible to compile the compiler with back-trace
3365 :     annotations turned on (I did it to get some confidence in
3366 :     correctness), you must make absolutely sure that core.sml and
3367 :     btimp.sml are compiled WITHOUT annotation! (core.sml cannot actually
3368 :     be compiled with annotation because there is no core access yet, but
3369 :     if you compile btimp.sml with annotation, then the system will go into
3370 :     an infinite recursion and crash.)
3371 :     Since CM currently does not know about BTrace, the only way to turn
3372 :     annotations on and off for different modules of the compiler is to
3373 :     interrupt CMB.make, change the settings, and re-invoke it. Of course,
3374 :     this is awkward and clumsy.
3375 :    
3376 :     Sample sessions:
3377 :    
3378 :     Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
3379 :     - SMLofNJ.Internals.BTrace.mode (SOME true);
3380 :     [autoloading]
3381 :     [autoloading done]
3382 :     val it = false : bool
3383 :     - structure X = struct
3384 :     - fun main n = let
3385 :     - fun a (x, 0) = d x
3386 :     - | a (x, n) = b (x, n - 1)
3387 :     - and b (x, n) = c (x, n)
3388 :     - and c (x, n) = a (x, n)
3389 :     - and d x = e (x, 3)
3390 :     - and e (x, 0) = f x
3391 :     - | e (x, n) = e (x, n - 1)
3392 :     - and f 0 = SMLofNJ.Internals.BTrace.trigger ()
3393 :     - | f n = n * g (n - 1)
3394 :     - and g n = a (n, 3)
3395 :     - in
3396 :     - f n
3397 :     - end
3398 :     - end;
3399 :     structure X : sig val main : int -> int end
3400 :     - X.main 3;
3401 :     *** BACK-TRACE ***
3402 :     GOTO stdIn:4.2-13.20: X.main[2].f
3403 :     GOTO-( stdIn:4.2-13.20: X.main[2].e
3404 :     GOTO stdIn:4.2-13.20: X.main[2].d
3405 :     / stdIn:4.2-13.20: X.main[2].a
3406 :     | stdIn:4.2-13.20: X.main[2].b
3407 :     GOTO-\ stdIn:4.2-13.20: X.main[2].c
3408 :     CALL stdIn:4.2-13.20: X.main[2].g
3409 :     GOTO stdIn:4.2-13.20: X.main[2].f
3410 :     GOTO-( stdIn:4.2-13.20: X.main[2].e
3411 :     GOTO stdIn:4.2-13.20: X.main[2].d
3412 :     / stdIn:4.2-13.20: X.main[2].a
3413 :     | stdIn:4.2-13.20: X.main[2].b
3414 :     GOTO-\ stdIn:4.2-13.20: X.main[2].c
3415 :     CALL stdIn:4.2-13.20: X.main[2].g
3416 :     GOTO stdIn:4.2-13.20: X.main[2].f
3417 :     GOTO-( stdIn:4.2-13.20: X.main[2].e
3418 :     GOTO stdIn:4.2-13.20: X.main[2].d
3419 :     / stdIn:4.2-13.20: X.main[2].a
3420 :     | stdIn:4.2-13.20: X.main[2].b
3421 :     GOTO-\ stdIn:4.2-13.20: X.main[2].c
3422 :     CALL stdIn:4.2-13.20: X.main[2].g
3423 :     GOTO stdIn:4.2-13.20: X.main[2].f
3424 :     CALL stdIn:2.15-17.4: X.main[2]
3425 :     -
3426 :    
3427 :     (Note that because of a FLINt bug the above code currently does not
3428 :     compile without BTrace turned on.)
3429 :    
3430 :     Here is another example, using my modified Tiger compiler:
3431 :    
3432 :     Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
3433 :     - SMLofNJ.Internals.BTrace.mode (SOME true);
3434 :     [autoloading]
3435 :     [autoloading done]
3436 :     val it = false : bool
3437 :     - CM.make "sources.cm";
3438 :     [autoloading]
3439 :     ...
3440 :     [autoloading done]
3441 :     [scanning sources.cm]
3442 :     [parsing (sources.cm):parse.sml]
3443 :     [creating directory CM/SKEL ...]
3444 :     [parsing (sources.cm):tiger.lex.sml]
3445 :     ...
3446 :     [wrote CM/sparc-unix/semant.sml]
3447 :     [compiling (sources.cm):main.sml]
3448 :     [wrote CM/sparc-unix/main.sml]
3449 :     [New bindings added.]
3450 :     val it = true : bool
3451 :     - Main.compile ("../testcases/merge.tig", "foo.out");
3452 :     *** BACK-TRACE ***
3453 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
3454 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
3455 :     CALL lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
3456 :     GOTO lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
3457 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
3458 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
3459 :     CALL lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
3460 :     / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
3461 :     CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
3462 :     CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
3463 :     CALL lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
3464 :     CALL main.sml:1.18-118.4: Main.compile[2]
3465 :     -
3466 :    
3467 :     ----------------------------------------------------------------------
3468 : blume 673 Name: Matthias Blumen
3469 :     Date: 2000/06/21 18:00:00 JST
3470 :     Tag: blume-20000621-manual
3471 :     Description:
3472 :    
3473 :     CM manual update: Path environments documented.
3474 :    
3475 :     ----------------------------------------------------------------------
3476 : blume 666 Name: Matthias Blume
3477 : blume 672 Date: 2000/06/19 13:40:00
3478 :     Tag: blume-20000619-manual
3479 :     Description:
3480 :    
3481 :     CM manual and system/README update. This only covers the fact that
3482 :     there are no more implicit anchors. (Path environments and the "bind"
3483 :     option to "cm" have yet to be documented.)
3484 :    
3485 :     ----------------------------------------------------------------------
3486 :     Name: Matthias Blume
3487 : blume 671 Date: 2000/06/19 11:05:00 JST
3488 :     Tag: blume-20000619-chdir-bugfix
3489 :     Description:
3490 :    
3491 :     Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
3492 :    
3493 :     ----------------------------------------------------------------------
3494 :     Name: Matthias Blume
3495 : blume 670 Date: 2000/06/18 22:00:10 JST
3496 :     Tag: blume-20000618-implicit-anchors-really-gone
3497 :     Description:
3498 :    
3499 :     I updates the previous HISTORY entry where I forgot to mention that
3500 :     implicit anchors are no longer with us.
3501 :    
3502 :     The current update also gets rid of the (now useless) controller
3503 :     CM.Control.implicit_anchors.
3504 :    
3505 :     ----------------------------------------------------------------------
3506 :     Name: Matthias Blume
3507 : blume 666 Date: 2000/06/16 17:30:00 JST
3508 :     Tag: blume-20000616-anchorenv
3509 :     Description:
3510 :    
3511 :     This patch implements the long anticipated (just kidding :) "anchor
3512 :     environment" mechanism. In the course of doing this, I also
3513 :     re-implemented CM's internal "SrcPath" module from scratch. The new
3514 :     one should be more robust in certain boundary cases. In any case, it
3515 :     is a lot cleaner than its predecessor (IMHO).
3516 :    
3517 :     This time, although there is yet another boot file format change, I
3518 :     kept the unpickler backward-compatible. As a result, no new bootfiles
3519 :     are necessary and bootstrapping is straightforward. (You cannot read
3520 :     new bootfiles into an old system, but the other way around is no
3521 :     problem.)
3522 :    
3523 :     Visible changes:
3524 :    
3525 : blume 670 ** 0. Implicit path anchors (without the leading $-symbol) are no
3526 :     longer recognized at all. This means that such path names are not
3527 :     illegal either. For example, the name basis.cm simply refers to a
3528 :     local file called "basis.cm" (i.e, the name is an ordinary path
3529 :     relative to .cm-files directory). Or, to put it differently, only
3530 :     names that start with $ are anchored paths.
3531 : blume 666
3532 : blume 670 ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
3533 :     vanished.
3534 :    
3535 :     John (Reppy) had critizised this as soon as I originally proposed and
3536 : blume 666 implemented it, but at that time I did not really deeply believe
3537 :     him. :) Now I came full-circle because I need the $<singlearc> syntax
3538 :     in another place where it cannot be seen as an abbreviation for
3539 :     $/<singlearc>. To avoid the confusion, $<singlearc> now means what it
3540 :     seems to mean (i.e., it "expands" into the corresponding anchor
3541 :     value).
3542 :    
3543 :     However, when paths are used as members in CM description files, it
3544 :     continues to be true that there must be at least another arc after the
3545 :     anchor. This is now enforced separately during semantic analysis
3546 : blume 670 (i.e., from a lexical/syntactical point of view, the notation is ok.)
3547 : blume 666
3548 :     ** 2. The "cm" class now accepts an option "bind". The option's value
3549 :     is a sub-option list of precisely two items -- one labeled "anchor"
3550 :     and the other one labeled "value". As you might expect, "anchor" is
3551 :     used to specify an anchor name to be bound, and "value" specifies what
3552 :     the anchor is being bound to.
3553 :    
3554 :     The value must be a directory name and can be given in either standard
3555 :     syntax (including the possibility that it is itself an anchored path)
3556 :     or native syntax.
3557 :    
3558 :     Examples:
3559 :    
3560 :     foo.cm (bind:(anchor:bar value:$mystuff/bar))
3561 :     lib.cm (bind:(anchor:a value:"H:\\x\\y\\z")) (* only works under windows *)
3562 :    
3563 :     and so on.
3564 :    
3565 :     The meaning of this is that the .cm-file will be processed with an
3566 :     augmented anchor environment where the given anchor(s) is/are bound to
3567 :     the given values(s).
3568 :    
3569 :     The rationale for having this feature is this: Suppose you are trying
3570 :     to use two different (already stable) libraries a.cm and b.cm (that
3571 :     you perhaps didn't write yourself). Further, suppose each of these
3572 :     two libraries internally uses its own auxiliary library $aux/lib.cm.
3573 :     Normally you would now have a problem because the anchor "lib" can not
3574 :     be bound to more than one value globally. Therefore, the project that
3575 :     uses both a.cm and b.cm must locally redirect the anchor to some other
3576 :     place:
3577 :    
3578 :     a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
3579 :     b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
3580 :    
3581 :     This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
3582 :     /usr/lib/smlnj/b-stuff/aux.cm, respectively.
3583 :    
3584 :     Hard-wiring path names is a bit inflexible (and CM will verbosely warn
3585 :     you when you do so at the time of CM.stabilize). Therefore, you can
3586 :     also use an anchored path as the value:
3587 :    
3588 :     a.cm (bind:(anchor:lib value:$a-lib))
3589 :     b.cm (bind:(anchor:lib value:$b-lib))
3590 :    
3591 :     Now you can globally configure (using the usual CM.Anchor.anchor or
3592 :     pathconfig machinery) bindings for "a-lib" and "b-lib". Since "lib"
3593 :     itself is always locally bound, setting it globally is no longer
3594 :     meaningful or necessary (but it does not hurt either). In fact, "lib"
3595 :     can still be used as a global anchor for separate purposes. As a
3596 :     matter of fact, one can locally define "lib" in terms of a global
3597 :     "lib":
3598 :    
3599 :     a.cm (bind:(anchor:lib value:$lib/a))
3600 :     b.cm (bind:(anchor:lib value:$lib/b))
3601 :    
3602 :     ** 3: The encoding of path names has changed. This affects the way
3603 :     path names are shown in CM's progress report and also the internal
3604 :     protocol encoding used for parallel make.
3605 :    
3606 :     The encoding now uses one or more ':'-separated segments. Each
3607 :     segments corresponds to a file that has been specified relative to the
3608 :     file given by its preceding segment. The first segment is either
3609 :     relative to the CWD, absolute, or anchored. Each segment itself is
3610 :     basically a Unix pathname; all segments but the first are relative.
3611 :    
3612 :     Example:
3613 :    
3614 :     $foo/bar/baz.cm:a/b/c.sml
3615 :    
3616 :     This path denotes the file bar/a/b/c.sml relative to the directory
3617 :     denoted by anchor "foo". Notice that the encoding also includes
3618 :     baz.cm which is the .cm-file that listed a/b/c.sml. As usual, such
3619 :     paths are resolved relative to the .cm-files directory, so baz.cm must
3620 :     be ignored to get the "real" pathname.
3621 :    
3622 :     To make this fact more obvious, CM puts the names of such "virtual
3623 :     arcs" into parentheses when they appear in progress reports. (No
3624 :     parentheses will appear in the internal protocol encoding.) Thus,
3625 :     what you really see is:
3626 :    
3627 :     $foo/bar/(baz.cm):a/b/c.sml
3628 :    
3629 :     I find this notation to be much more informative than before.
3630 :    
3631 :     Another new feature of the encoding is that special characters
3632 :     including parentheses, colons, (back)slashes, and white space are
3633 :     written as \ddd (where ddd is the decimal encoding of the character).
3634 :    
3635 : blume 670 *** The CM manual still needs to be updated.
3636 :    
3637 : blume 666 ----------------------------------------------------------------------
3638 : leunga 660 Name: Allen Leung
3639 :     Date: 2000/06/15 00:38:00
3640 :     Tag: leunga-20000615-x86-peephole
3641 :    
3642 :     x86 Peephole fix by Fermin. Affects c-- and moby only.
3643 :    
3644 :     ----------------------------------------------------------------------
3645 : blume 658 Name: Matthias Blume
3646 :     Date: 2000/06/12 11:40:00
3647 :     Tag: blume-20000612-parmakefix
3648 :     Description:
3649 :    
3650 :     More cleanup after changing the file naming scheme: This time I
3651 :     repaired the parallel make mechanism for CMB.make which I broke earlier.
3652 :    
3653 :     ----------------------------------------------------------------------
3654 : leunga 657 Name: Allen Leung
3655 :     Date: 2000/06/09 01:25:00
3656 :     Tag: leunga-20000609-various
3657 :    
3658 :     None of these things should affect normal SML/NJ operations
3659 :    
3660 :     1. Peephole improvements provided by Fermin (c--)
3661 :     2. New annotation DEFUSE for adding extra dependence (moby)
3662 :     3. New X86 LOCK instructions (moby)
3663 :     4. New machine description language for reservation tables (scheduling)
3664 :     5. Fixes to various optimization/analysis modules (branch chaining, dominator
3665 :     trees etc.)
3666 :     6. I've changed the CM files so that they can work with versions
3667 :     110.0.6, 110.25 and 110.28
3668 :    
3669 :     ----------------------------------------------------------------------
3670 : blume 652 Name: Matthias Blume
3671 : blume 656 Date: 2000/06/09 12:40:00
3672 :     Tag: blume-20000609-log
3673 :     Description:
3674 :    
3675 :     - Removed all(?) remaining RCS Log entries from sources.
3676 :    
3677 :     - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
3678 :     anchored paths).
3679 :    
3680 :     ----------------------------------------------------------------------
3681 :     Name: Matthias Blume
3682 : blume 653 Date: 2000/06/07 17:00:00 JST
3683 :     Tag: blume-20000607-no-implicit-anchors
3684 :     Description:
3685 :    
3686 :     1. This update changes the default setting for
3687 :     CM.Control.implicit_anchors from true to false. This means that
3688 :     implicit anchors are no longer permitted by default. I also tried to
3689 :     make sure that nothing else still relies on implicit anchors.
3690 :     (This is the next step on the schedule towards a CM that does not even
3691 :     have the notion of implicit anchors anymore.)
3692 :    
3693 :     2. More CM manual updates.
3694 :    
3695 :     3. I managed to track down and fix the pickling bug I mentioned last
3696 :     time. Because of the previously existing workaround, this entails no
3697 :     immediate practical changes.
3698 :    
3699 :     ----------------------------------------------------------------------
3700 :     Name: Matthias Blume
3701 : blume 652 Date: 2000/06/06 11:15:00 JST
3702 :     Tag: blume-20000606-lazierpickle
3703 :     Description:
3704 :    
3705 :     !!!! NEW BOOT FILES !!!!
3706 :    
3707 :     * The main purpose of this update is to make library pickles lazier in
3708 :     order to reduce the initial space penalty for autoloading a library.
3709 :     As a result, it is now possible to have $smlnj/compiler.cm
3710 :     pre-registered. This should take care of the many complaints or
3711 :     inquiries about missing structure Compiler. This required changes to
3712 :     CM's internal data structures and small tweaks to some algorithms.
3713 :    
3714 :     As a neat additional effect, it is no longer necessary (for the sake
3715 :     of lean heap image files) to distinguish between a "minimal" CM and a
3716 :     "full" CM. Now, there is only one CM (i.e., the "full" version:
3717 :     $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
3718 :     interactive top level. ($smlnj/cm/minimal.cm is gone.)
3719 :    
3720 :     To make the life of compiler-hackers easier, "makeml" now also
3721 :     pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm). In other
3722 :     words, after you bootstrap a new sml for the first time, you will not
3723 :     have to autoload $smlnj/cmb.cm again afterwards. (The first time
3724 :     around you will still have to do it, though.)
3725 :    
3726 :     * A second change consists of major updates to the CM manual. There
3727 :     are now several appendices with summary information and also a full
3728 :     specification of the CM description file syntax.
3729 :    
3730 :     * In directory src/system I added the script "allcross". This script
3731 :     invokes sml and cross-compiles the compiler for all supported
3732 :     architectures. (Useful when providing a new set of boot files.)
3733 :    
3734 :     * There seems to be a latent bug in my "lazy pickles" mechanism. I
3735 :     added a small tweak to pickle-util.sml to work around this problem,
3736 :     but it is not a proper fix yet. I will investigate further. (The
3737 :     effect of the bug was an inflation of library pickle size.)
3738 :    
3739 :     * Version number increased to 110.28.1 (to avoid compatibility problems).
3740 :    
3741 :     ----------------------------------------------------------------------
3742 : leunga 646 Name: Allen Leung
3743 : leunga 648 Date: 2000/05/25 17:28 EDT
3744 :     Tag: leunga-20000525-ra
3745 :     Description:
3746 :    
3747 :     Fixed a bug in freezing phase of the register allocator.
3748 :    
3749 :     ----------------------------------------------------------------------
3750 :     Name: Allen Leung
3751 : leunga 647 Date: 2000/05/15 22:53 EDT
3752 : leunga 646 Tag: leunga-20000515-alpha-x86-ra
3753 :     Description:
3754 :    
3755 :     1. Alpha
3756 :    
3757 :     Slight cleanup. Removed the instruction SGNXL
3758 :    
3759 :     2. X86
3760 :    
3761 :     Added the following instructions to the instruction set:
3762 :    
3763 :     ROLx, RORx,
3764 :     BTx, BTSx, BTLx, BTRx,
3765 :     XCHGx, and variants with the LOCK prefix
3766 :    
3767 :     3. Register Allocation
3768 :    
3769 :     The module ra-rewrite-with-renaming has been improved.
3770 :    
3771 : leunga 647 These have no effect on SML/NJ.
3772 :    
3773 : leunga 646 ----------------------------------------------------------------------
3774 : blume 642 Name: Matthias Blume
3775 : blume 645 Date: 2000/05/15 16:20:00 JST
3776 :     Tag: blume-20000515-lightrebuild
3777 :     Description:
3778 :    
3779 :     1. I added an alternative to "-rebuild" to "makeml". The difference is
3780 :     that prior to calling CMB.make' the CM-variable "LIGHT" will be
3781 :     defined. In effect, the command will not build any cross-compiler
3782 :     backends and therefore finish more quickly.
3783 :    
3784 :     The "fixpt" script also takes a "-light" switch to be able to use
3785 :     this new facility while compiling for a fixpoint.
3786 :    
3787 :     2. I replaced all mentions of anchored paths in group owner specifications
3788 :     with simple relative paths (usually starting with "..").
3789 :     The rationale is that a library's internal workings should not be
3790 :     compromised by the lack of some anchor. (An anchor is necessary
3791 :     for someone who wants to refer to the library by an anchored path,
3792 :     but it should not be necessary to build the same library in the first
3793 :     place.)
3794 :    
3795 :     3. I changed the way CM's tool mechanism determines the shell command
3796 :     string used for things like ml-yacc etc. so that it does not break
3797 :     when CM.Control.implicit_anchors is turned off.
3798 :    
3799 :     ----------------------------------------------------------------------
3800 :     Name: Matthias Blume
3801 : blume 644 Date: 2000/05/12 18:20:00 JST
3802 :     Tag: blume-20000512-ml-build
3803 :     Description:
3804 :    
3805 :     Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
3806 :     getting installed properly (by config/install.sh).
3807 :    
3808 :     ----------------------------------------------------------------------
3809 :     Name: Matthias Blume
3810 : blume 643 Date: 2000/05/12 17:30:00 JST
3811 :     Tag: blume-20000512-anchors
3812 :     Description:
3813 :    
3814 :     !!! NEW BOOT FILES !!!
3815 :    
3816 :     This change is in preparation of fading out support for "implicitly
3817 :     anchored path names". I went through all sources and used the
3818 :     explicit (and relatively new) $-notation. See system/README and the
3819 :     CM manual for more info on this.
3820 :    
3821 :     I also modified the anchoring scheme for some things such as "smlnj",
3822 :     "MLRISC", "cm", etc. to take advantage of the fact that explicit
3823 :     anchors are more expressive: anchor name and first arc do not have to
3824 :     coincide. This entails the following user-visible change:
3825 :    
3826 :     You have to write $smlnj/foo/bar instead of smlnj/foo/bar. In
3827 :     particular, when you fire up sml with a command-line argument, say,
3828 :     e.g.:
3829 :    
3830 :     sml '$smlnj/cmb.cm'
3831 :    
3832 :     At the ML toplevel prompt:
3833 :    
3834 :     CM.autoload "$smlnj/cmb.cm";
3835 :    
3836 :     There is also a new controller in CM.Control that can be used to turn
3837 :     off all remaining support for implicit anchors by saying:
3838 :    
3839 :     CM.autoload "$smlnj/
3840 :     #set CM.Control.implicit_anchors false;
3841 :    
3842 :     This causes CM to reject implicitly anchored paths. This is (for the
3843 :     time being) less permissive than the "final" version where there will
3844 :     be no more such implicit anchors and relative paths will be just that:
3845 :     relative.
3846 :    
3847 :     The next step (version after next version?) will be to make the
3848 :     default for CM.Control.implicit_anchors false. After the dust has
3849 :     settled, I can then produce the "final" version of this...
3850 :    
3851 :     Note: Since bootstrapping is a bit tricky, I provided new boot files.
3852 :    
3853 :     ----------------------------------------------------------------------
3854 :     Name: Matthias Blume
3855 : blume 642 Date: 2000/05/11 16:30:00 JST
3856 :     Tag: blume-20000511-sources
3857 :     Description:
3858 :    
3859 :     The main change is that I added function CM.sources as a generalized
3860 :     version of the earlier CM.makedepend. This entails the following
3861 :     additional changes:
3862 :    
3863 :     - CM.makedepend has been dropped.
3864 :    
3865 :     - CM manual has been updated.
3866 :    
3867 :     - TOOLS signature and API have been changed.
3868 :    
3869 :     ----------------------------------------------------------------------
3870 : leunga 640 Name: Allen Leung
3871 : leunga 641 Date: 2000/05/10 21:17 EDT
3872 :     Tag: leunga-20000510-moby-c--ssa
3873 :     Description:
3874 :    
3875 :     Various bug fixes and new features for C--, Moby and MLRISC optimizations.
3876 :     None of these affect SML/NJ.
3877 :    
3878 :     1. Register Allocation
3879 :    
3880 :     a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
3881 :     This module tries to remove local (i.e. basic block level) redundancies
3882 :     during spilling.
3883 :    
3884 :     b. A new framework for performing region based register allocation.
3885 :     Not yet entirely functional.
3886 :    
3887 :     2. X86
3888 :    
3889 :     a. DefUse for POP was missing the stack pointer [found by Lal]
3890 :     b. Reload for CALL was incorrect in X86Spill [found by John]
3891 :     c. Various fixes in X86Spill so that it can be used correctly for
3892 :     the new spilling module.
3893 :    
3894 :     3. SSA/IR
3895 :    
3896 :     a. New module ir/dj-dataflow.sml implements elimination based
3897 :     data flow analysis.
3898 :    
3899 :     4. MLRiscGen
3900 :    
3901 :     a. Fix for gc type annotation
3902 :    
3903 :     5. MDGen
3904 :    
3905 :     Various fixes for machine description -> ml code translation. For ssa
3906 :     only.
3907 :    
3908 :     ----------------------------------------------------------------------
3909 :     Name: Allen Leung
3910 : leunga 640 Date: 2000/05/08 22:17 EDT
3911 :     Tag: leunga-20000508-labexp
3912 :     Description:
3913 :    
3914 :     Fermin has found a few assembly problems with constant expressions
3915 :     generated in LabelExp. Mostly, the problems involve extra parentheses,
3916 :     which choke on dumb assemblers. This is his fix.
3917 :    
3918 :     ----------------------------------------------------------------------
3919 : dbm 635 Name: Dave MacQueen
3920 :     Date: 2000/04/09 14:00 EDT
3921 :     Tag: dbm-20000502-Version_110_28
3922 :     Description:
3923 :    
3924 :     1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
3925 :    
3926 :     2. Updated config/version to 110.28
3927 :    
3928 :     3. Updated config/srcarchiveurl
3929 :    
3930 :     3. New boot files!
3931 :     ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
3932 :    
3933 :     ----------------------------------------------------------------------
3934 : blume 634 Name: Matthias Blume
3935 :     Date: 2000/05/01 19:05:00 JST
3936 :     Tag: blume-20000501-noweb
3937 :     Description:
3938 :    
3939 :     A new noweb tool has been added. The existing system is entirely
3940 :     unaffected by this, but some CM users have asked for renewed noweb
3941 :     support. Everything is documented in the CM manual.
3942 :    
3943 :     New (plugin) libraries:
3944 :    
3945 :     noweb-tool.cm
3946 :     nw-ext.cm
3947 :    
3948 :     ----------------------------------------------------------------------
3949 : dbm 633 Name: Dave MacQueen
3950 :     Date: 2000/04/30 12:40PM EDT
3951 :     Tag: dbm-20000430-bug_fixes
3952 :     Description:
3953 :    
3954 :     1. Fix for bug 1498
3955 :     smlnj/src/system/Basis/Implementation/Unsafe/object.sig
3956 :     smlnj/src/system/Basis/Implementation/Unsafe/object.sml
3957 :     added toRealArray function
3958 :     smlnj/src/compiler/MiscUtil/print/ppobj.sml
3959 :     added check for tag Obj.RealArray to array printing case in ppObj
3960 :    
3961 :     2. Fix for bug 1510
3962 :     smlnj/src/compiler/Semant/types/typesutil.sml
3963 :     fixed definition of dummyargs (used by equalTycon) so that
3964 :     dummy args are distinct types
3965 :    
3966 :     ----------------------------------------------------------------------
3967 : blume 629 Name: Matthias Blume
3968 : blume 632 Date: 2000/04/30 01:00:00 JST
3969 :     Tag: blume-20000430-versions
3970 :     Description:
3971 :    
3972 :     1. CM version numbering added. This is an implementation of Lal's
3973 :     proposal for adding version numbers and version checking to .cm
3974 :     files. Lal said that his proposal was just that -- a proposal.
3975 :     For the time being I went ahead and implemented it so that people
3976 :     can comment on it. Everything is completely backward-compatible
3977 :     (except for the stable library format, i.e., new bootfiles!).
3978 :    
3979 :     As usual, see the CM manual for details.
3980 :    
3981 :     2. An alternative syntax for anchored paths has been implemented.
3982 :     Dave has recently voiced the same concerns that I had when I did
3983 :     this, so there should be some support. My take is that eventually
3984 :     I will let support for the current syntax (where anchors are
3985 :     "implicit") fade out in favor of the new, explicit syntax.
3986 :     In order to be backward-compatible, both old and new syntax are
3987 :     currently supported.
3988 :    
3989 :     Again, see the CM manual for details.
3990 :    
3991 :     3. Parallel make is trying to be slightly smarter: When the master
3992 :     process finds a "bottleneck", i.e., when there is only one
3993 :     compilation unit that can be compiled and everybody else is
3994 :     waiting on it, then it will simply compile it directly instead
3995 :     of clumsily telling one of the slaves to do it.
3996 :    
3997 :     4. Support for "unsharing" added. This is necessary in order to be
3998 :     able to have two different versions of the same library running
3999 :     at the same time (e.g., for trying out a new MLRISC while still
4000 :     having the old MLRISC linked into the current compiler, etc.)
4001 :     See the CM manual.
4002 :    
4003 :     5. Simple "makedepend" functionality added for generating Makefile
4004 :     dependency information. (This is rather crude at the moment.
4005 :     Expect some changes here in the future.)
4006 :    
4007 :     6. ".fun" added as a recognized suffix for ML files. Also documented
4008 :     explicitly in the manual that the fallback behavior (unknown suffix
4009 :     -> ML file) is not an official feature!
4010 :    
4011 :     7. Small changes to the pickler for stable libraries.
4012 :    
4013 :     8. Several internal changes to CM (for cleanup/improvement).
4014 :    
4015 :    
4016 :     !!!! NEW BINFILES !!!!
4017 :    
4018 :     ----------------------------------------------------------------------
4019 :     Name: Matthias Blume
4020 : blume 631 Date: 2000/04/28 17:30:00 JST
4021 :     Tag: blume-20000428-pathconfig
4022 :     Description:
4023 :    
4024 :     1. I changed config/install.sh to remove duplicate entries from the
4025 :     lib/pathconfig file at the end. Moreover, the final version of
4026 :     lib/pathconfig is sorted alphabetically. The same (sorting) is done
4027 :     in src/system/installml.
4028 :    
4029 :     2. The config/install.sh script now consistently uses relative
4030 :     pathnames in lib/pathconfig whenever the anchor is in the lib
4031 :     directory. (So far this was true for the libraries that come
4032 :     pre-compiled and bundled as part of the bootfiles but not for
4033 :     libraries that are compiled by the script itself.)
4034 :    
4035 :     ----------------------------------------------------------------------
4036 :     Name: Matthias Blume
4037 : blume 629 Date: 2000/04/26 13:10:00 JST
4038 :     Tag: blume-20000426-fun_suffix
4039 :     Description:
4040 :    
4041 :     Added ".fun" as a recognized file name suffix (for ML code).
4042 :    
4043 :     ----------------------------------------------------------------------
4044 : leunga 628 Name: Allen Leung
4045 :     Date: 2000/04/25 17:00:00 EST
4046 :     Tag: leunga-20000425-alpha-ra
4047 :     Description:
4048 :    
4049 :     1. Alpha
4050 :    
4051 :     PSEUDOARITH was missing in AlphaRewrite. This causes an endless loop
4052 :     in C--.
4053 :    
4054 :     2. RA
4055 :    
4056 :     Added a flag "ra-dump-size" to print out the size of the flowgraph
4057 :     and the interference graph.
4058 :    
4059 :     ----------------------------------------------------------------------
4060 : dbm 627 Name: Dave MacQueen
4061 :     Date: 2000/04/25/
4062 :     Tag: dbm-20000425-mlyacc_doc_examples
4063 :     Description:
4064 :     Updated mlyacc.tex sections 5 and 7 for SML '97 and CM.
4065 :     Updated all three examples in src/ml-yacc/examples to run
4066 :     under 110.* using CM.make.
4067 :    
4068 :     ----------------------------------------------------------------------
4069 : leunga 624 Name: Allen Leung
4070 :     Date: 2000/04/20 23:04:00 EST
4071 :     Tag: leunga-20000420-ssa-c---stuff
4072 :     Description:
4073 :    
4074 :     This update synchronizes my repository with Yale's. Most of these
4075 :     changes, however, do not affect SML/NJ at all (the RA is an exception).
4076 :    
4077 :     1. Register Allocator
4078 :    
4079 :     a. An improvement in the interference graph construction:
4080 :     Given a copy
4081 :    
4082 :     s <- t
4083 :    
4084 : leunga 628 no interference edge between s and t is added for this definition of s.
4085 : leunga 624
4086 :     b. I've added two new spill heuristic modules that Fermin and I developed
4087 :     (in the new library RA.cm). These are unused in SML/NJ but maybe
4088 :     useful for others (Moby?)
4089 :    
4090 :     2. X86
4091 :    
4092 :     a. Various fixes in the backend provided by Fermin [C--] and Lal.
4093 :    
4094 :     3. Alpha
4095 :    
4096 :     a. Added the BSR instruction and code generation that goes with it [C--]
4097 :     b. Other fixes too numerous to recount provided by Fermin [C--]
4098 :    
4099 :     4. Regmaps
4100 :    
4101 :     a. The regmaps are not initialized with the identity physical bindings
4102 :     at creation time. This is unneeded.
4103 :    
4104 :     5. MLRISC Optimizations
4105 :    
4106 :     a. The DJ-Graph module can now compute the iterated dominance frontiers
4107 :     intersects with liveness incrementally in linear time! Woohoo!
4108 :     This is now used in my new SSA construction algorithm.
4109 :    
4110 :     b. THe branch reorganization module is now smarter about linear chains of
4111 :     basic blocks.
4112 :    
4113 :    
4114 :     ----------------------------------------------------------------------
4115 : blume 615 Name: Matthias Blume
4116 :     Date: 2000/04/12 13:52:00 JST
4117 :     Tag: blume_main_v110p27_1
4118 :     Description:
4119 :    
4120 :     Changed install.sh script to handle archive files without version number
4121 :     and to use "boot.<arch>-<os>" instead of "sml.boot.<arch>-<os>" for the
4122 :     name of the boot file archive.
4123 :    
4124 :     ----------------------------------------------------------------------
4125 : dbm 607 Name: Dave MacQueen
4126 :     Date: 2000/04/09 14:00 EDT
4127 :     Tag: dbm-20000410-Version_110_27
4128 :     Description:
4129 :    
4130 :     1. Updated src/compiler/TopLevel/main/version.sml to version 110.27
4131 :    
4132 :     2. Updated src/config/version to 110.27
4133 :    
4134 :     3. New boot files!
4135 :    
4136 :     ----------------------------------------------------------------------
4137 : leunga 606 Name: Allen Leung
4138 :     Date: 2000/04/09 19:09:00 EST
4139 :     Tag: leunga-20000409-misc
4140 :     Description:
4141 :    
4142 :     1. Yet another fix for x86 assembly for idivl, imull, mull and friends.
4143 :    
4144 :     2. Miscellaneous improvements to MLRISC (unused in sml/nj)
4145 :    
4146 :     ----------------------------------------------------------------------
4147 : monnier 605 Name: Stefan
4148 :     Date: 2000/04/07 10:00:00 EDT
4149 :     Tag: monnier-20000406-branch-handling
4150 :     Description:
4151 :    
4152 :     Improved handling of branches (mostly those generated from
4153 :     polymorphic equality), removed switchoff and changed the
4154 :     default optimization settings (more cpsopt and less flintopt).
4155 :    
4156 :     ----------------------------------------------------------------------
4157 : leunga 601 Name: Allen Leung
4158 : leunga 602 Date: 2000/04/06 01:30:00 EST
4159 :     Tag: leunga-20000406-peephole-x86-SSA-2
4160 :     Description:
4161 :    
4162 :     Forgot a few files.
4163 :    
4164 :     ----------------------------------------------------------------------
4165 :     Name: Allen Leung
4166 : leunga 601 Date: 2000/04/06 00:36:00 EST
4167 :     Tag: leunga-20000406-peephole-x86-SSA
4168 :     Description:
4169 :    
4170 :     1. New Peephole code
4171 :    
4172 :     2. Minor improvement to X86 instruction selection
4173 :    
4174 :     3. Various fixes to SSA and machine description -> code translator
4175 :    
4176 :     ----------------------------------------------------------------------
4177 : blume 595 Name: Matthias Blume
4178 :     Date: 2000/04/05 12:30:00 JST
4179 :     Tag: blume_main_v110p26p2_3
4180 :     Description:
4181 :    
4182 :     This update just merges three minor cosmetic updates to CM's sources
4183 :     to get ready for the 110.27 code freeze on Friday. No functionality
4184 :     has changed.
4185 :    
4186 :     ----------------------------------------------------------------------
4187 : leunga 593 Name: Allen Leung
4188 : leunga 594 Date: 2000/04/04 19:39:00 EST
4189 :     Tag: leunga-20000404-x86-asm
4190 :     Description:
4191 :    
4192 :     1. Fixed a problem in X86 assembly.
4193 :    
4194 :     Things like
4195 :    
4196 :     jmp %eax
4197 :     jmp (%eax)
4198 :    
4199 :     should be output as
4200 :    
4201 :     jmp *%eax
4202 :     jmp *(%eax)
4203 :    
4204 :     2. Assembly output
4205 :    
4206 :     Added a new flag
4207 :    
4208 :     "asm-indent-copies" (default to false)
4209 :    
4210 :     When this flag is on, parallel copies will be indented an extra level.
4211 :    
4212 :     ----------------------------------------------------------------------
4213 :     Name: Allen Leung
4214 : leunga 593 Date: 2000/04/04 03:18:00 EST
4215 :     Tag: leunga-20000404-C--Moby
4216 :     Description:
4217 :    
4218 :     All of these fixes are related to C--, Moby, and my own optimization
4219 :     stuff; so they shouldn't affect SML/NJ.
4220 :    
4221 :     1. X86
4222 :    
4223 :     Various fixes related floating point, and extensions.
4224 :    
4225 :     2. Alpha
4226 :    
4227 :     Some extra patterns related to loads with signed/zero extension
4228 :     provided by Fermin.
4229 :    
4230 :     3. Assembly
4231 :    
4232 : monnier 659 When generating assembly, resolve the value of client defined constants,
4233 : leunga 593 instead of generating symbolic values. This is controlled by the
4234 :     new flag "asm-resolve-constants", which is default to true.
4235 :    
4236 :     4. Machine Descriptions
4237 :    
4238 :     a. The precedence parser was slightly broken when parsing infixr symbols.
4239 :     b. The type generalizing code had the bound variables reversed, resulting
4240 :     in a problem during arity raising.
4241 :     c. Various fixes in machine descriptions.
4242 :    
4243 :     ----------------------------------------------------------------------
4244 : blume 592 Name: Matthias Blume
4245 :     Date: 2000/04/03 16:05:00 JST
4246 :     Tag: blume_main_v110p26p2_2
4247 :     Description:
4248 :    
4249 :     I eliminated coreEnv from compInfo. Access to the "Core" structure is
4250 :     now done via the ordinary static environment that is context to each
4251 :     compilation unit.
4252 :    
4253 :     To this end, I arranged that instead of "structure Core" as "structure
4254 :     _Core" is bound in the pervasive environment. Core access is done via
4255 : monnier 659 _Core (which can never be accidentally rebound because _Core is not a
4256 : blume 592 legal surface-syntax symbol).
4257 :    
4258 :     The current solution is much cleaner because the core environment is
4259 :     now simply part of the pervasive environment which is part of every
4260 :     compilation unit's context anyway. In particular, this eliminates all
4261 :     special-case handling that was necessary until now in order to deal
4262 :     with dynamic and symbolic parts of the core environment.
4263 :    
4264 :     Remaining hackery (to bind the "magic" symbol _Core) is localized in the
4265 : monnier 659 compilation manager's bootstrap compiler (actually: in the "init group"
4266 : blume 592 handling). See the comments in src/system/smlnj/init/init.cmi for
4267 :     more details.
4268 :    
4269 :     I also tried to track down all mentions of "Core" (as string argument
4270 :     to Symbol.strSymbol) in the compiler and replaced them with a
4271 :     reference to the new CoreSym.coreSym. Seems cleaner since the actual
4272 :     name appears in one place only.
4273 :    
4274 :     Binfile and bootfile format have not changed, but the switchover from
4275 :     the old "init.cmi" to the new one is a bit tricky, so I supplied new
4276 :     bootfiles anyway.
4277 :    
4278 :     ----------------------------------------------------------------------
4279 : leunga 591 Name: Allen Leung
4280 :     Date: 2000/04/02 21:17:00 EST
4281 :     Tag: leunga-20000402-mltree
4282 :     Description:
4283 : leunga 585
4284 : leunga 591 1. Renamed the constructor CALL in MLTREE by popular demand.
4285 :     2. Added a bunch of files from my repository. These are currently
4286 :     used by other non-SMLNJ backends.
4287 :    
4288 : leunga 576 ----------------------------------------------------------------------
4289 : leunga 590 Name: Allen Leung
4290 :     Date: 2000/03/31 21:15:00 EST
4291 :     Tag: leunga-20000331-aliasing
4292 :     Description:
4293 :    
4294 :     This update contains a rewritten (and hopefully more correct) module
4295 :     for extracting aliasing information from CPS.
4296 :    
4297 :     To turn on this feature:
4298 :    
4299 :     Compiler.Control.CG.memDisambiguate := true
4300 :    
4301 :     To pretty print the region information with assembly
4302 :    
4303 :     Compiler.Control.MLRISC.getFlag "asm-show-region" := true;
4304 :    
4305 :     To control how many levels of aliasing information are printed, use:
4306 :    
4307 :     Compiler.Control.MLRISC.getInt "points-to-show-level" := n
4308 :    
4309 :     The default of n is 3.
4310 :    
4311 :     ----------------------------------------------------------------------
4312 : dbm 589 Name: David MacQueen
4313 :     Date: 2000/03/31 11:15:00 EST
4314 :     Tag: dbm-20000331-runtime_fix
4315 :     Description:
4316 :    
4317 :     This update contains:
4318 :    
4319 :     1. runtime/c-lib/c-libraries.c
4320 :     includes added in revision 1.2 caused compilation errors on hppa-hpux
4321 :    
4322 :     2. fix for bug 1556
4323 :     system/Basis/Implementation/NJ/internal-signals.sml
4324 :    
4325 :     ----------------------------------------------------------------------
4326 : blume 587 Name: Matthias Blume
4327 : blume 588 Date: 2000/03/31 18:00:00 JST
4328 :     Tag: blume_main_v110p26p2_1
4329 :     Description:
4330 :    
4331 :     This update contains:
4332 :    
4333 :     1. A small change to CM's handling of stable libraries:
4334 :     CM now maintains one "global" modmap that is used for all stable
4335 :     libraries. The use of such a global modmap maximizes sharing and
4336 :     minimizes the need for re-traversing parts of environments during
4337 :     modmap construction. (However, this has minor impact since modmap
4338 :     construction seems to account for just one percent or less of total
4339 :     compile time.)
4340 :    
4341 :     2. I added a "genmap" phase to the statistics. This is where I got the
4342 :     "one percent" number (see above).
4343 :    
4344 :     3. CM's new tool parameter mechanism just became _even_ better. :)
4345 :     - The parser understands named parameters and recursive options.
4346 :     - The "make" and "shell" tools use these new features.
4347 :     (This makes it a lot easier to cascade these tools.)
4348 :     - There is a small syntax change: named parameters use a
4349 :    
4350 :     <name> : ( <option> ... ) or
4351 :     <name> : <str