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revision 814, Tue May 1 15:44:45 2001 UTC revision 1124, Thu Mar 7 19:49:22 2002 UTC
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8  The form of an entry should be:  The form of an entry should be:
9    
10  Name:  Name:
11  Date:  Date: yyyy/mm/dd
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16    Name: Lal George
17    Date: 2002/03/07 14:44:24 EST 2002
18    Tag: george-20020307-weighted-block-placement
19    
20    Tested the weighted block placement optimization on all architectures
21    (except the hppa) using AMPL to generate the block and edge frequencies.
22    Changes were required in the machine properties to correctly
23    categorize trap instructions. There is an MLRISC flag
24    "weighted-block-placement" that can be used to enable weighted block
25    placement, but this will be ineffective without block/edge
26    frequencies (coming soon).
27    
28    
29    ----------------------------------------------------------------------
30    Name: Lal George
31    Date: 2002/03/05 17:24:48 EST
32    Tag: george-20020305-linkage-cluster
33    
34    In order to support the block placement optimization, a new cluster
35    is generated as the very first cluster (called the linkage cluster).
36    It contains a single jump to the 'real' entry point for the compilation
37    unit. Block placement has no effect on the linkage cluster itself, but
38    all the other clusters  have full freedom in the manner in which they
39    reorder blocks or functions.
40    
41    On the x86 the typical linkage code that is generated is:
42       ----------------------
43            .align 2
44       L0:
45            addl    $L1-L0, 72(%esp)
46            jmp     L1
47    
48    
49            .align  2
50       L1:
51       ----------------------
52    
53    72(%esp) is the memory location for the stdlink register. This
54    must contain the address of the CPS function being called. In the
55    above example, it contains the address of  L0; before
56    calling L1 (the real entry point for the compilation unit), it
57    must contain the address for L1, and hence
58    
59            addl $L1-L0, 72(%esp)
60    
61    I have tested this on all architectures except the hppa.The increase
62    in code size is of course negligible
63    
64    ----------------------------------------------------------------------
65    Name: Allen Leung
66    Date: 2002/03/03 13:20:00 EST
67    Tag: leunga-20020303-mlrisc-tools
68    
69      Added #[ ... ] expressions to mlrisc tools
70    
71    ----------------------------------------------------------------------
72    Name: Matthias Blume
73    Date: 2002/02/27 12:29:00 EST
74    Tag: blume-20020227-cdebug
75    Description:
76    
77    - made types in structure C and C_Debug to be equal
78    - got rid of code duplication (c-int.sml vs. c-int-debug.sml)
79    - there no longer is a C_Int_Debug (C_Debug is directly derived from C)
80    
81    ----------------------------------------------------------------------
82    Name: Matthias Blume
83    Date: 2002/02/26 12:00:00 EST
84    Tag: blume-20020226-ffi
85    Description:
86    
87    1. Fixed a minor bug in CM's "noweb" tool:
88       If numbering is turned off, then truly don't number (i.e., do not
89       supply the -L option to noweb).  The previous behavior was to supply
90       -L'' -- which caused noweb to use the "default" line numbering scheme.
91       Thanks to Chris Richards for pointing this out (and supplying the fix).
92    
93    2. Once again, I reworked some aspects of the FFI:
94    
95       A. The incomplete/complete type business:
96    
97       - Signatures POINTER_TO_INCOMPLETE_TYPE and accompanying functors are
98         gone!
99       - ML types representing an incomplete type are now *equal* to
100         ML types representing their corresponding complete types (just like
101         in C).  This is still safe because ml-nlffigen will not generate
102         RTTI for incomplete types, nor will it generate functions that
103         require access to such RTTI.   But when ML code generated from both
104         incomplete and complete versions of the C type meet, the ML types
105         are trivially interoperable.
106    
107         NOTE:  These changes restore the full generality of the translation
108         (which was previously lost when I eliminated functorization)!
109    
110       B. Enum types:
111    
112       - Structure C now has a type constructor "enum" that is similar to
113         how the "su" constructor works.  However, "enum" is not a phantom
114         type because each "T enum" has values (and is isomorphic to
115         MLRep.Signed.int).
116       - There are generic access operations for enum objects (using
117         MLRep.Signed.int).
118       - ml-nlffigen will generate a structure E_foo for each "enum foo".
119         * The structure contains the definition of type "mlrep" (the ML-side
120         representation type of the enum).  Normally, mlrep is the same
121         as "MLRep.Signed.int", but if ml-nlffigen was invoked with "-ec",
122         then mlrep will be defined as a datatype -- thus facilitating
123         pattern matching on mlrep values.
124         ("-ec" will be suppressed if there are duplicate values in an
125          enumeration.)
126         * Constructors ("-ec") or values (no "-ec") e_xxx of type mlrep
127         will be generated for each C enum constant xxx.
128         * Conversion functions m2i and i2m convert between mlrep and
129         MLRep.Signed.int.  (Without "-ec", these functions are identities.)
130         * Coversion functions c and ml convert between mlrep and "tag enum".
131         * Access functions (get/set) fetch and store mlrep values.
132       - By default (unless ml-nlffigen was invoked with "-nocollect"), unnamed
133         enumerations are merged into one single enumeration represented by
134         structure E_'.
135    
136    ----------------------------------------------------------------------
137    Name: Allen Leung
138    Date: 2002/02/25 04:45:00 EST
139    Tag: leunga-20020225-cps-spill
140    
141    This is a new implementation of the CPS spill phase.
142    The new phase is in the new file compiler/CodeGen/cpscompile/spill-new.sml
143    In case of problems, replace it with the old file spill.sml
144    
145    The current compiler runs into some serious performance problems when
146    constructing a large record.  This can happen when we try to compile a
147    structure with many items.  Even a very simple structure like the following
148    makes the compiler slow down.
149    
150        structure Foo = struct
151           val x_1 = 0w1 : Word32.int
152           val x_2 = 0w2 : Word32.int
153           val x_3 = 0w3 : Word32.int
154           ...
155           val x_N = 0wN : Word32.int
156        end
157    
158    The following table shows the compile time, from N=1000 to N=4000,
159    with the old compiler:
160    
161    N
162    1000   CPS 100 spill                           0.04u  0.00s  0.00g
163           MLRISC ra                               0.06u  0.00s  0.05g
164              (spills = 0 reloads = 0)
165           TOTAL                                   0.63u  0.07s  0.21g
166    
167    1100   CPS 100 spill                           8.25u  0.32s  0.64g
168           MLRISC ra                               5.68u  0.59s  3.93g
169              (spills = 0 reloads = 0)
170           TOTAL                                   14.71u  0.99s  4.81g
171    
172    1500   CPS 100 spill                           58.55u  2.34s  1.74g
173           MLRISC ra                               5.54u  0.65s  3.91g
174              (spills = 543 reloads = 1082)
175           TOTAL                                   65.40u  3.13s  6.00g
176    
177    2000   CPS 100 spill                           126.69u  4.84s  3.08g
178           MLRISC ra                               0.80u  0.10s  0.55g
179              (spills = 42 reloads = 84)
180           TOTAL                                   129.42u  5.10s  4.13g
181    
182    3000   CPS 100 spill                           675.59u  19.03s  11.64g
183           MLRISC ra                               2.69u  0.27s  1.38g
184              (spills = 62 reloads = 124)
185           TOTAL                                   682.48u  19.61s  13.99g
186    
187    4000   CPS 100 spill                           2362.82u  56.28s  43.60g
188           MLRISC ra                               4.96u  0.27s  2.72g
189              (spills = 85 reloads = 170)
190           TOTAL                                   2375.26u  57.21s  48.00g
191    
192    As you can see the old cps spill module suffers from some serious
193    performance problem.  But since I cannot decipher the old code fully,
194    instead of patching the problems up, I'm reimplementing it
195    with a different algorithm.  The new code is more modular,
196    smaller when compiled, and substantially faster
197    (O(n log n) time and O(n) space).  Timing of the new spill module:
198    
199    4000  CPS 100 spill                           0.02u  0.00s  0.00g
200          MLRISC ra                               0.25u  0.02s  0.15g
201             (spills=1 reloads=3)
202          TOTAL                                   7.74u  0.34s  1.62g
203    
204    Implementation details:
205    
206    As far as I can tell, the purpose of the CPS spill module is to make sure the
207    number of live variables at any program point (the bandwidth)
208    does not exceed a certain limit, which is determined by the
209    size of the spill area.
210    
211    When the bandwidth is too large, we decrease the register pressure by
212    packing live variables into spill records.  How we achieve this is
213    completely different than what we did in the old code.
214    
215    First, there is something about the MLRiscGen code generator
216    that we should be aware of:
217    
218    o MLRiscGen performs code motion!
219    
220       In particular, it will move floating point computations and
221       address computations involving only the heap pointer to
222       their use sites (if there is only a single use).
223       What this means is that if we have a CPS record construction
224       statement
225    
226           RECORD(k,vl,w,e)
227    
228       we should never count the new record address w as live if w
229       has only one use (which is often the case).
230    
231       We should do something similar to floating point, but the transformation
232       there is much more complex, so I won't deal with that.
233    
234    Secondly, there are now two new cps primops at our disposal:
235    
236     1. rawrecord of record_kind option
237        This pure operator allocates some uninitialized storage from the heap.
238        There are two forms:
239    
240         rawrecord NONE [INT n]  allocates a tagless record of length n
241         rawrecord (SOME rk) [INT n] allocates a tagged record of length n
242                                     and initializes the tag.
243    
244     2. rawupdate of cty
245          rawupdate cty (v,i,x)
246          Assigns to x to the ith component of record v.
247          The storelist is not updated.
248    
249    We use these new primops for both spilling and increment record construction.
250    
251     1. Spilling.
252    
253        This is implemented with a linear scan algorithm (but generalized
254        to trees).  The algorithm will create a single spill record at the
255        beginning of the cps function and use rawupdate to spill to it,
256        and SELECT or SELp to reload from it.  So both spills and reloads
257        are fine-grain operations.  In contrast, in the old algorithm
258        "spills" have to be bundled together in records.
259    
260        Ideally, we should sink the spill record construction to where
261        it is needed.  We can even split the spill record into multiple ones
262        at the places where they are needed.  But CPS is not a good
263        representation for global code motion, so I'll keep it simple and
264        am not attempting this.
265    
266     2. Incremental record construction (aka record splitting).
267    
268        Long records with many component values which are simulatenously live
269        (recall that single use record addresses are not considered to
270         be live) are constructed with rawrecord and rawupdate.
271        We allocate space on the heap with rawrecord first, then gradually
272        fill it in with rawupdate.  This is the technique suggested to me
273        by Matthias.
274    
275        Some restrictions on when this is applicable:
276        1. It is not a VECTOR record.  The code generator currently does not handle
277           this case. VECTOR record uses double indirection like arrays.
278        2. All the record component values are defined in the same "basic block"
279           as the record constructor.  This is to prevent speculative
280           record construction.
281    
282    ----------------------------------------------------------------------
283    Name: Allen Leung
284    Date: 2002/02/22 01:02:00 EST
285    Tag: leunga-20020222-mlrisc-tools
286    
287    Minor bug fixes in the parser and rewriter
288    
289    ----------------------------------------------------------------------
290    Name: Allen Leung
291    Date: 2002/02/21 20:20:00 EST
292    Tag: leunga-20020221-peephole
293    
294    Regenerated the peephole files.  Some contained typos in the specification
295    and some didn't compile because of pretty printing bugs in the old version
296    of 'nowhere'.
297    
298    ----------------------------------------------------------------------
299    Name: Allen Leung
300    Date: 2002/02/19 20:20:00 EST
301    Tag: leunga-20020219-mlrisc-tools
302    Description:
303    
304       Minor bug fixes to the mlrisc-tools library:
305    
306       1.  Fixed up parsing colon suffixed keywords
307       2.  Added the ability to shut the error messages up
308       3.  Reimplemented the pretty printer and fixed up/improved
309           the pretty printing of handle and -> types.
310       4.  Fixed up generation of literal symbols in the nowhere tool.
311       5.  Added some SML keywords to to sml.sty
312    
313    ----------------------------------------------------------------------
314    Name: Matthias Blume
315    Date: 2002/02/19 16:20:00 EST
316    Tag: blume-20020219-cmffi
317    Description:
318    
319    A wild mix of changes, some minor, some major:
320    
321    * All C FFI-related libraries are now anchored under $c:
322        $/c.cm      --> $c/c.cm
323        $/c-int.cm  --> $c/internals/c-int.cm
324        $/memory.cm --> $c/memory/memory.cm
325    
326    * "make" tool (in CM) now treats its argument pathname slightly
327      differently:
328        1. If the native expansion is an absolute name, then before invoking
329           the "make" command on it, CM will apply OS.Path.mkRelative
330           (with relativeTo = OS.FileSys.getDir()) to it.
331        2. The argument will be passed through to subsequent phases of CM
332           processing without "going native".  In particular, if the argument
333           was an anchored path, then "make" will not lose track of that anchor.
334    
335    * Compiler backends now "know" their respective C calling conventions
336      instead of having to be told about it by ml-nlffigen.  This relieves
337      ml-nlffigen from one of its burdens.
338    
339    * The X86Backend has been split into X86CCallBackend and X86StdCallBackend.
340    
341    * Export C_DEBUG and C_Debug from $c/c.cm.
342    
343    * C type encoding in ml-nlffi-lib has been improved to model the conceptual
344      subtyping relationship between incomplete pointers and their complete
345      counterparts.  For this, ('t, 'c) ptr has been changed to 'o ptr --
346      with the convention of instantiating 'o with ('t, 'c) obj whenever
347      the pointer target type is complete.  In the incomplete case, 'o
348      will be instantiated with some "'c iobj" -- a type obtained by
349      using one of the functors PointerToIncompleteType or PointerToCompleteType.
350    
351      Operations that work on both incomplete and complete pointer types are
352      typed as taking an 'o ptr while operations that require the target to
353      be known are typed as taking some ('t, 'c) obj ptr.
354    
355      voidptr is now a bit "more concrete", namely "type voidptr = void ptr'"
356      where void is an eqtype without any values.  This makes it possible
357      to work on voidptr values using functions meant to operate on light
358      incomplete pointers.
359    
360    * As a result of the above, signature POINTER_TO_INCOMPLETE_TYPE has
361      been vastly simplified.
362    
363    ----------------------------------------------------------------------
364    Name: Matthias Blume
365    Date: 2002/02/19 10:48:00 EST
366    Tag: blume-20020219-pqfix
367    Description:
368    
369    Applied Chris Okasaki's bug fix for priority queues.
370    
371    ----------------------------------------------------------------------
372    Name: Matthias Blume
373    Date: 2002/02/15 17:05:00
374    Tag: Release_110_39
375    Description:
376    
377    Last-minute retagging is becoming a tradition... :-(
378    
379    This is the working release 110.39.
380    
381    ----------------------------------------------------------------------
382    Name: Matthias Blume
383    Date: 2002/02/15 16:00:00 EST
384    Tag: Release_110_39-orig
385    Description:
386    
387    Working release 110.39.  New bootfiles.
388    
389    (Update: There was a small bug in the installer so it wouldn't work
390    with all shells.  So I retagged. -Matthias)
391    
392    ----------------------------------------------------------------------
393    Name: Matthias Blume
394    Date: 2002/02/15 14:17:00 EST
395    Tag: blume-20020215-showbindings
396    Description:
397    
398    Added EnvRef.listBoundSymbols and CM.State.showBindings.  Especially
399    the latter can be useful for exploring what bindings are available at
400    the interactive prompt.  (The first function returns only the list
401    of symbols that are really bound, the second prints those but also the
402    ones that CM's autoloading mechanism knows about.)
403    
404    ----------------------------------------------------------------------
405    Name: Matthias Blume
406    Date: 2002/02/15 12:08:00 EST
407    Tag: blume-20020215-iptrs
408    Description:
409    
410    Two improvements to ml-nlffigen:
411    
412      1. Write files only if they do not exist or if their current contents
413         do not coincide with what's being written.  (That is, avoid messing
414         with the time stamps unless absolutely necessary.)
415    
416      2. Implement a "repository" mechanism for generated files related
417         to "incomplete pointer types".   See the README file for details.
418    
419    ----------------------------------------------------------------------
420    Name: Matthias Blume
421    Date: 2002/02/14 11:50:00 EST
422    Tag: blume-20020214-quote
423    Description:
424    
425    Added a type 't t_' to tag.sml (in ml-nlffi-lib.cm).  This is required
426    because of the new and improved tag generation scheme.  (Thanks to Allen
427    Leung for pointing it out.)
428    
429    ----------------------------------------------------------------------
430    Name: Lal George
431    Date: 2002/02/14 09:55:27 EST 2002
432    Tag: george-20020214-isabelle-bug
433    Description:
434    
435    Fixed the MLRISC bug sent by Markus Wenzel regarding the compilation
436    of Isabelle on the x86.
437    
438    From Allen:
439    -----------
440     I've found the problem:
441    
442         in ra-core.sml, I use the counter "blocked" to keep track of the
443         true number of elements in the freeze queue.  When the counter goes
444         to zero, I skip examining the queue.  But I've messed up the
445         bookkeeping in combine():
446    
447             else ();
448             case !ucol of
449               PSEUDO => (if !cntv > 0 then
450                     (if !cntu > 0 then blocked := !blocked - 1 else ();
451                                        ^^^^^^^^^^^^^^^^^^^^^^^
452                      moveu := mergeMoveList(!movev, !moveu)
453                     )
454                  else ();
455    
456         combine() is called to coalesce two nodes u and v.
457         I think I was thinking that if the move counts of u and v are both
458         greater than zero then after they are coalesced then one node is
459         removed from the freeze queue.  Apparently I was thinking that
460         both u and v are of low degree, but that's clearly not necessarily true.
461    
462    
463    02/12/2002:
464        Here's the patch.  HOL now compiles.
465    
466        I don't know how this impact on performance (compile
467        time or runtime).  This bug caused the RA (especially on the x86)
468        to go thru the potential spill phase when there are still nodes on the
469        freeze queue.
470    
471    
472    
473    
474    ----------------------------------------------------------------------
475    Name: Matthias Blume
476    Date: 2002/02/13 22:40:00 EST
477    Tag: blume-20020213-fptr-rtti
478    Description:
479    
480    Fixed a bug in ml-nlffigen that was introduced with one of the previous
481    updates.
482    
483    ----------------------------------------------------------------------
484    Name: Matthias Blume
485    Date: 2002/02/13 16:41:00 EST
486    Tag: blume-20020213-cmlpq
487    Description:
488    
489    Added new priority queue export symbols (which have just been added to
490    smlnj-lib.cm) to CML's version of smlnj-lib.cm.  (Otherwise CML would
491    not compile and the installer would choke.)
492    
493    ----------------------------------------------------------------------
494    Name: Matthias Blume
495    Date: 2002/02/13 16:15:00 EST
496    Tag: blume-20020213-various
497    Description:
498    
499    1. More tweaks to ml-nlffigen:
500    
501       - better internal datastructures (resulting in slight speedup)
502       - "-match" option requires exact match
503       - "localized" gensym counters (untagged structs/unions nested within
504         other structs/unions or within typedefs get a fresh counter; their
505         tag will be prefixed by a concatenation of their parents' tags)
506       - bug fixes (related to calculation of transitive closure of types
507         to be included in the output)
508    
509    2. Minor Basis updates:
510    
511       - added implementations for List.collate and Option.app
512    
513    ----------------------------------------------------------------------
514    Name: Matthias Blume
515    Date: 2002/02/11 15:55:00 EST
516    Tag: blume-20020211-gensym
517    Description:
518    
519    Added a "-gensym" option to command line of ml-nlffigen.  This can be
520    used to specify a "stem" -- a string that is inserted in all "gensym'd"
521    names (ML structure names that correspond to unnamed C structs, unions,
522    and enums), so that separate runs of ml-nlffigen do not clash.
523    
524    ----------------------------------------------------------------------
525    Name: Matthias Blume
526    Date: 2002/02/11 12:05:00 EST
527    Tag: blume-20020211-gensml
528    Description:
529    
530    A quick fix for a problem with GenSML (in the pgraph-util library):
531    Make generation of toplevel "local" optional.  (Strictly speaking,
532    signature definitions within "local" are not legal SML.)
533    
534    Other than that: updates to INSTALL and cm/TODO.
535    
536    ----------------------------------------------------------------------
537    Name: Matthias Blume
538    Date: 2002/02/08 15:00:00 EST
539    Tag: blume-20020208-uniquepid
540    Description:
541    
542    0. Version number has been bumped to 110.38.1.  NEW BOOTFILES!!!
543    
544    1. The installer (config/install.sh) has gotten smarter:
545    
546         - Configuration options are a bit easier to specify now
547           (in config/targets).
548         - Bug in recognizing .tar.bz2 files fixed.
549         - Installer automatically resolves dependencies between
550           configuration options (e.g., if you ask for eXene, you will
551           also get cml -- regardless whether you asked for it or not).
552         - Installer can run in "quieter mode" by setting the environment
553           variable INSTALL_QUIETLY to "true".  "Quieter" does not mean
554           "completely silent", though.
555         - Build HashCons library as part of smlnj-lib.
556    
557    2. A new scheme for assigning persistent identifiers to compilation
558       units (and, by extension, to types etc.) has been put into place.
559       This fixes a long-standing bug where types and even dynamic values
560       can get internally confused, thereby compromising type safety
561       (abstraction) and dynamic correctness.  See
562    
563         http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
564    
565       for an example of how things could go wrong until now.
566    
567       The downside of the new scheme is that pids are not quite as
568       persistent as they used to be: CM will generate a fresh pid
569       for every compilation unit that it thinks it sees for the first
570       time.  That means that if you compile starting from a clean, fresh
571       source tree at two different times, you end up with different
572       binaries.
573    
574       Cutoff recompilation, however, has not been compromised because
575       CM keeps pid information in special caches between runs.
576    
577    ----------------------------------------------------------------------
578    Name: Lal George
579    Date: 2002/02/07 15:34:13 EST 2002
580    Tag: <none>
581    Description:
582    
583    Compilers that generate assembly code may produce  global labels
584    whose value is resolved at link time. The various peephole optimization
585    modules did not take this in account.
586    
587    TODO. The Labels.addrOf function should really return an option
588    type so that clients are forced to deal with this issue, rather
589    than an exception being raised.
590    
591    ----------------------------------------------------------------------
592    Name: Lal George
593    Date: 2002/02/06 13:55:02 EST
594    Tag: george-20020206-ra-breakup
595    Description:
596    
597    1. A bug fix from Allen.
598    
599        A typo causes extra fstp %st(0)'s to be generated at compensation
600        edges, which might cause stack underflow traps at runtime.  This
601        occurs in fft where there are extraneous fstps right before the 'into'
602        trap instruction (in this case they are harmless since none of the
603        integers overflow.)
604    
605    2. Pulled out various utility modules that were embedded in the modules
606       of the register allocator. I need these modules for other purposes, but
607       they are not complete enough to put into a library (just yet).
608    ----------------------------------------------------------------------
609    Name: Matthias Blume
610    Date: 2002/01/31 16:05:00 EST
611    Tag: blume-20020131-sparc-ccalls
612    Description:
613    
614    1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
615       of extra stack space by mistake.  Fixed.
616    
617    2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
618    
619    ----------------------------------------------------------------------
620    Name: Allen Leung
621    Date: 2002/01/30
622    Tag: leunga-20020130-nowhere-bug-fix
623    Description:
624    
625       MLRISC bug fixes:
626       1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
627       2. MachineInt.fromString was negating its value.
628    
629    ----------------------------------------------------------------------
630    Name: Matthias Blume
631    Date: 2002/01/29
632    Tag: blume-20020129-INSTALL
633    Description:
634    
635    - Added somewhat detailed installation instructions (file INSTALL).
636    - Fixed curl-detection bug in config/install.sh.
637    - It is now possible to select the URL getter using the URLGETTER
638      environment variable:
639    
640          not set / "unknown"      --> automatic detection (script tries wget,
641                                       curl, and lynx)
642          "wget" / "curl" / "lynx" --> use the specified program (script "knows"
643                                       how to properly invoke them)
644          other                    --> use $URLGETTER directly, it must take
645                                       precisely two command-line arguments
646                                       (source URL and destination file name)
647    
648    ----------------------------------------------------------------------
649    Name: Matthias Blume
650    Date: 2002/01/28
651    Tag: blume-20020128-sparc-ccalls
652    Description:
653    
654    - Fixed problem with calculation of "used" registers in sparc-c-calls.
655    - Make use of the allocParam argument in sparc-c-calls.
656    
657    ----------------------------------------------------------------------
658    Name: Matthias Blume
659    Date: 2002/01/28
660    Tag: blume-20020128-allocParam
661    Description:
662    
663    John Reppy:  Changes c-calls API to accept client-callback for
664    allocating extra stack space.
665    me: Corresponding changes to mlriscGen (using a dummy argument that
666        does not change the current behavior).
667    
668    ----------------------------------------------------------------------
669    Name: Matthias Blume
670    Date: 2002/01/28 12:00:00
671    Tag: Release_110_38
672    Description:
673    
674    This time for real!!!
675    
676    ----------------------------------------------------------------------
677    Name: Matthias Blume
678    Date: 2002/01/28 10:56:00 EST
679    Tag: blume-20020128-retraction
680    Description:
681    
682    0. Retracted earlier 110.38.  (The Release_110_38 tag has been replaced
683       with blume-Release_110_38-retracted.)
684    
685    1. Fixed a problem with incorrect rounding modes in real64.sml.
686       (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
687    
688    2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
689       and enums fixed.  The naming of corresponding ML identifiers should
690       now be consistent again.
691    
692    ----------------------------------------------------------------------
693    Name: Allen Leung
694    Date: 2002/01/27
695    Tag: leunga-20020127-nowhere
696    Description:
697    
698       Added a target called nowhere in the configuration scripts.
699       Enabling this will build the MLRISC 'nowhere' tool (for translating
700       programs with where-clauses into legal SML code) during installation.
701    
702    ----------------------------------------------------------------------
703    Name: Matthias Blume
704    Date: 2002/01/25 21:27:00 EST
705    Tag: blume-Release_110_38-retracted
706    Description:
707    
708    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
709    
710    README will be added later.
711    
712    !!! NOTE:  Re-tagged as blume-Release_110_38-retracted. Original tag
713    (Release_110_38) removed.  Reason: Last-minute bug fixes.
714    
715    ----------------------------------------------------------------------
716    Name: Matthias Blume
717    Date: 2002/01/25
718    Tag: blume-20020125-ffi
719    Description:
720    
721    A large number of tweaks and improvements to ml-nlffi-lib and
722    ml-nlffigen:
723    
724       - ML represenation types have been streamlined
725       - getter and setter functions work with concrete values, not abstract
726         ones where possible
727       - ml-nlffigen command line more flexible (see README file there)
728       - some bugs have been fixed (hopefully)
729    
730    ----------------------------------------------------------------------
731    Name: Lal George
732    Date: 2002/01/24
733    Tag: george-20020124-risc-ra-interface
734    Description:
735    
736       There is a dramatic simplification in the interface to the
737       register allocator for RISC architectures as a result of making
738       parallel copy instructions explicit.
739    
740    ----------------------------------------------------------------------
741    Name: Matthias Blume
742    Date: 2002/01/22
743    Tag: blume-20020122-x86-ccalls
744    Description:
745    
746    Bug fix for c-calls on x86 (having to do with how char- and
747    short-arguments are being handled).
748    
749    ----------------------------------------------------------------------
750    Name: Matthias Blume
751    Date: 2002/01/21
752    Tag: blume-20020121-ff
753    Description:
754    
755    Another day of fiddling with the FFI...
756    
757    1. Bug fix/workaround:  CKIT does not complain about negative array
758       dimensions, so ml-nlffigen has to guard itself against this possibility.
759       (Otherwise a negative dimension would send it into an infinite loop.)
760    
761    2. Some of the abstract types (light objects, light pointers, most "base"
762       types) in structure C are now eqtypes.
763    
764    3. Added constructors and test functions for NULL function pointers.
765    
766    ----------------------------------------------------------------------
767    Name: Matthias Blume
768    Date: 2002/01/18
769    Tag: blume-20020118-ready-for-new-release
770    Description:
771    
772    Made config/srcarchiveurl point to a new place.  (Will provide boot
773    files shortly.)
774    
775    Maybe we christen this to be 110.38?
776    
777    ----------------------------------------------------------------------
778    Name: Matthias Blume
779    Date: 2002/01/18
780    Tag: blume-20020118-more-ffifiddle
781    Description:
782    
783    Today's FFI fiddling:
784    
785      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
786        C.Set.* that use concrete (MLRep.*) arguments and results instead
787        of abstract ones.
788    
789      - Provided word-style bit operations etc. for "int" representation
790        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
791        and Long.
792    
793    ----------------------------------------------------------------------
794    Name: Matthias Blume
795    Date: 2002/01/18
796    Tag: blume-20020118-use-x86-fp
797    Description:
798    
799    Now that x86-fast-fp seems to be working, I turned it back on again
800    by default.  (Seems to work fine now, even with the FFI.)
801    
802    Other than that, I added some documentation about the FFI to
803    src/ml-nlffigen/README and updated the FFI test examples in
804    src/ml-nlffi-lib/Tests/*.
805    
806    ----------------------------------------------------------------------
807    Name: Allen Leung
808    Date: 2002/01/17
809    Tag: leunga-20020117-x86-fast-fp-call
810    Description:
811    
812       1. Fixed a problem with handling return fp values when x86's fast fp
813          mode is turned on.
814    
815       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
816          of %f32.
817    
818       3. Added a constructor INT32lit to the ast of MLRISC tools.
819    
820    ----------------------------------------------------------------------
821    Name: Matthias Blume
822    Date: 2002/01/16
823    Tag: blume-20020116-ffifiddle
824    Description:
825    
826    More fiddling with the FFI interface:
827    
828     - Make constness 'c instead of rw wherever possible.  This eliminates
829       the need for certain explicit coercions.  (However, due to ML's
830       value polymorphism, there will still be many cases where explicit
831       coercions are necessary.  Phantom types are not the whole answer
832       to modeling a subtyping relationship in ML.)
833    
834     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
835    
836     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
837       clumsy workaround for varargs problem.)
838    
839    ----------------------------------------------------------------------
840    Name: Lal George
841    Date: 2002/01/15
842    Tag: <none>
843    Description:
844    
845    1. Since COPY instructions are no longer native to the architecture,
846       a generic functor can be used to implement the expandCopies function.
847    
848    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
849       TEXT segment.
850    
851    ----------------------------------------------------------------------
852    Name: Matthias Blume
853    Date: 2002/01/15
854    Tag: blume-20020115-ffiupdates
855    Description:
856    
857    1. Fix for bug resulting in single-precision float values being returned
858       incorrectly from FFI calls.
859    
860    2. Small modifications to C FFI API:
861    
862        - memory-allocation routines return straight objects (no options)
863          and raise an exception in out-of-memory situations
864        - unsafe extensions to cast between function pointers and pointers
865          from/to ints
866        - added structure C_Debug as an alternative to structure C where
867          pointer-dereferencing (|*| and |*!) always check for null-pointers
868        - added open_lib' to DynLinkage;  open_lib' works like open_lib
869          but also takes a (possibly empty) list of existing library handles
870          that the current library depends on
871    
872    ----------------------------------------------------------------------
873    Name: Matthias Blume
874    Date: 2002/01/10
875    Tag: blume-20020110-newffigen
876    Description:
877    
878    1. Updates to portable graph code.
879    
880    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
881       more scalable now so that even huge interfaces such as the one
882       for GTK compile in finite time and space. :-)
883       See src/ml-nlffigen/README for details on what's new.
884    
885    ----------------------------------------------------------------------
886    Name: Lal George
887    Date: 2001/01/09 14:31:35 EST 2002
888    Tag: george-20011206-rm-native-copy
889    Description:
890    
891            Removed the native COPY and FCOPY instructions
892            from all the architectures and replaced it with the
893            explicit COPY instruction from the previous commit.
894    
895            It is now possible to simplify many of the optimizations
896            modules that manipulate copies. This has not been
897            done in this change.
898    
899    ----------------------------------------------------------------------
900    Name: Lal George
901    Date: 2001/12/06 16:50:13 EST 2001
902    Tag: george-20011206-mlrisc-instruction
903    Description:
904    
905    Changed the representation of instructions from being fully abstract
906    to being partially concrete. That is to say:
907    
908      from
909            type instruction
910    
911      to
912            type instr                              (* machine instruction *)
913    
914            datatype instruction =
915                LIVE of {regs: C.cellset, spilled: C.cellset}
916              | KILL of {regs: C.cellset, spilled: C.cellset}
917              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
918              | ANNOTATION of {i: instruction, a: Annotations.annotation}
919              | INSTR of instr
920    
921    This makes the handling of certain special instructions that appear on
922    all architectures easier and uniform.
923    
924    LIVE and KILL say that a list of registers are live or killed at the
925    program point where they appear. No spill code is generated when an
926    element of the 'regs' field is spilled, but the register is moved to
927    the 'spilled' (which is present, more for debugging than anything else).
928    
929    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
930    We used to generate:
931    
932            DEFFREG f1
933            f1 := f2 + f3
934            trapb
935    
936    but now generate:
937    
938            f1 := f2 + f3
939            trapb
940            LIVE {regs=[f1,f2,f3], spilled=[]}
941    
942    Furthermore, the DEFFREG (hack) required that all floating point instruction
943    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
944    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
945    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
946    this architecture).
947    
948    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
949    all the architectures. This will result in further simplification of the
950    register allocator that must be aware of them for coalescing purposes, and
951    will also simplify certain aspects of the machine description that provides
952    callbacks related to parallel copies.
953    
954    ANNOTATION should be obvious, and now INSTR represents the honest to God
955    machine instruction set!
956    
957    The <arch>/instructions/<arch>Instr.sml files define certain utility
958    functions for making porting easier -- essentially converting upper case
959    to lower case. All machine instructions (of type instr) are in upper case,
960    and the lower case form generates an MLRISC instruction. For example on
961    the alpha we have:
962    
963      datatype instr =
964         LDA of {r:cell, b:cell, d:operand}
965       | ...
966    
967      val lda : {r:cell, b:cell, d:operand} -> instruction
968        ...
969    
970    where lda is just (INSTR o LDA), etc.
971    
972    ----------------------------------------------------------------------
973    Name: Matthias Blume
974    Date: 2001/11/22 21:40:00 EST
975    Tag: Release_110_37
976    Description:
977    
978    Release 110.37.  This time for real.
979    
980    ----------------------------------------------------------------------
981    Name: Matthias Blume
982    Date: 2001/11/21 16:35:00 EST
983    Tag: blume-20011121-foot-in-mouth
984    Description:
985    
986    Removed the "Release_110_37" tag because of a serious bug.
987    This will be re-tagged once the bug is fixed.
988    
989    ----------------------------------------------------------------------
990    Name: Matthias Blume
991    Date: 2001/11/21 16:14:00 EST
992    Tag: blume-20011121-forgottenfile
993    Description:
994    
995    Forgot to add a file.  (Just a .tex-file -- part of
996    the CM manual source.)
997    
998    ----------------------------------------------------------------------
999    Name: Matthias Blume
1000    Date: 2001/11/21 16:10:00 EST
1001    Tag: blume-20011121-invalid_110_37
1002    Description:
1003    
1004    Note: I removed the original tag "Release_110_37" from this commit
1005          because we found a serious bug in all non-x86 backends.
1006          - Matthias
1007    
1008    1. Modifications to the SML/NJ code generator and to the runtime system
1009       so that code object name strings are directly inserted into code
1010       objects at code generation time.  The only business the runtime system
1011       has with this is now to read the name strings on occasions.
1012       (The encoding of the name string has also changed somewhat.)
1013    
1014    2. CM now implements a simple "set calculus" for specifying export lists.
1015       In particular, it is now possible to refer to the export lists of
1016       other libraries/groups/sources and form unions as well as differences.
1017       See the latest CM manual for details.
1018    
1019    3. An separate notion of "proxy" libraries has again be eliminated from
1020       CM's model.  (Proxy libraries are now simply a special case of using
1021       the export list calculus.)
1022    
1023    4. Some of the existing libraries now take advantage of the new set
1024       calculus.
1025       (Notice that not all libraries have been converted because some
1026       of the existing .cm-files are supposed to be backward compatible
1027       with 110.0.x.)
1028    
1029    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
1030       "General.exnMessage"!  The former relies on a certain hook to be
1031       initialized, and that often does not happen in the stand-alone case.)
1032    
1033    ----------------------------------------------------------------------
1034    Name: Lal George
1035    Date: 2001/11/21  13:56:18 EST
1036    Tag: george-2001121-pseudo-ops
1037    Description:
1038    
1039      Implemented a complete redesign of MLRISC pseudo-ops. Now there
1040      ought to never be any question of incompatabilities with
1041      pseudo-op syntax expected by host assemblers.
1042    
1043      For now, only modules supporting GAS syntax are implemented
1044      but more should follow, such as MASM, and vendor assembler
1045      syntax, e.g. IBM as, Sun as, etc.
1046    
1047    ----------------------------------------------------------------------
1048    Name: Matthias Blume
1049    Date: 2001/11/14 11:52:00 EST
1050    Tag: blume-20011114-srcname
1051    Description:
1052    
1053    1. Routed the name of the current source file to mlriscgen where it
1054       should be directly emitted into the code object.  (This last part
1055       is yet to be done.)
1056    
1057    2. Some cleanup of the pgraph code to make it match the proposal that
1058       I put out the other day.  (The proposal notwithstanding, things are
1059       still in flux here.)
1060    
1061    ----------------------------------------------------------------------
1062    Name: Lal George
1063    Date: 2001/11/14 09:44:04 EST
1064    Tag:
1065    Description:
1066    
1067      Fix for a backpatching bug reported by Allen.
1068    
1069      Because the boundary between short and long span-dependent
1070      instructions is +/- 128, there are an astounding number of
1071      span-dependent instructions whose size is over estimated.
1072    
1073      Allen came up with the idea of letting the size of span
1074      dependent instructions be non-monotonic, for a maxIter
1075      number of times, after which the size must be monotonically
1076      increasing.
1077    
1078      This table shows the number of span-dependent instructions
1079      whose size was over-estimated as a function of maxIter, for the
1080      file Parse/parse/ml.grm.sml:
1081    
1082         maxIter            # of instructions:
1083            10                      687
1084            20                      438
1085            30                      198
1086            40                        0
1087    
1088      In compiling the compiler, there is no significant difference in
1089      compilation speed between maxIter=10 and maxIter=40. Actually,
1090      my measurements showed that maxIter=40 was a tad faster than
1091      maxIter=10! Also 96% of the  files in the compiler reach a fix
1092      point within 13 iterations, so fixing maxIter at 40, while high,
1093      is okay.
1094    
1095    ----------------------------------------------------------------------
1096    Name: Matthias Blume
1097    Date: 2001/10/31 15:25:00 EST
1098    Tag: blume-20011031-pgraph
1099    Description:
1100    
1101    CKIT:
1102    * Changed the "Function" constructor of type Ast.ctype to carry optional
1103      argument identifiers.
1104    * Changed the return type of TypeUtil.getFunction accordingly.
1105    * Type equality ignores the argument names.
1106    * TypeUtil.composite tries to preserve argument names but gives up quickly
1107      if there is a mismatch.
1108    
1109    installation script:
1110    * attempts to use "curl" if available (unless "wget" is available as well)
1111    
1112    CM:
1113    * has an experimental implementation of "portable graphs" which I will
1114      soon propose as an implementation-independent library format
1115    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
1116    
1117    NLFFI-LIB:
1118    * some cleanup (all cosmetic)
1119    
1120    NLFFIGEN:
1121    * temporarily disabled the mechanism that suppresses ML output for
1122      C definitions whose identifiers start with an underscore character
1123    * generate val bindings for enum constants
1124    * user can request that only one style (light or heavy) is being used;
1125      default is to use both (command-line arguments: -heavy and -light)
1126    * fixed bug in handling of function types involving incomplete pointers
1127    * generate ML entry points that take record arguments (i.e., using
1128      named arguments) for C functions that have a prototype with named
1129      arguments
1130      (see changes to CKIT)
1131    
1132    ----------------------------------------------------------------------
1133    Name: Allen Leung
1134    Date: 2001/10/27 20:34:00 EDT
1135    Tag: leunga-20011027-x86-fast-fp-call
1136    Description:
1137    
1138       Fixed the bug described in blume-20010920-slowfp.
1139    
1140       The fix involves
1141          1. generating FCOPYs in FSTP in ia32-svid
1142          2. marking a CALL with the appropriate annotation
1143    
1144    ----------------------------------------------------------------------
1145    Name: Matthias Blume
1146    Date: 2001/10/16 11:32:00 EDT
1147    Tag: blume-20011016-netbsd
1148    Description:
1149    
1150    Underscore patch from Chris Richards (fixing problem with compiling
1151    runtime system under recent NetBSD).
1152    
1153    ----------------------------------------------------------------------
1154    Name: Allen Leung
1155    Date: 2001/10/12 17:18:32 EDT 2001
1156    Tag: leung-20011012-x86-printflowgraph
1157    Description:
1158    
1159    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
1160    
1161    ----------------------------------------------------------------------
1162    Name: Lal George
1163    Date: 2001/10/11 23:51:34 EDT
1164    Tag: george-20011011-too-many-instrs
1165    Description:
1166    
1167    The representation of a program point never expected to see more
1168    than 65536 instructions in a basic block!
1169    
1170    ----------------------------------------------------------------------
1171    Name: Lal George
1172    Date: 2001/10/09 09:41:37 EDT
1173    Tag: george-20011008-mlrisc-labels
1174    Description:
1175    
1176    Changed the machine description files to support printing of
1177    local and global labels in assembly code, based on host assembler
1178    conventions.
1179    
1180    ----------------------------------------------------------------------
1181    Name: Matthias Blume
1182    Date: 2001/09/25 15:25:00 EDT
1183    Tag: blume-20010925-exninfo
1184    Description:
1185    
1186    I provided a non-hook implementation of exnName (at the toplevel) and
1187    made the "dummy" implementation of exnMessage (at the toplevel) more
1188    useful: if nothing gets "hooked in", then at least you are going to
1189    see the exception name and a message indicating why you don't see more.
1190    
1191    [For the time being, programs that need exnMessage and want to use
1192    ml-build should either use General.exnMessage (strongly recommended) or
1193    refer to structure General at some other point so that CM sees a
1194    static dependency.]
1195    
1196    [Similar remarks go for "print" and "use":  If you want to use their
1197    functionality in stand-alone programs generated by ml-build, then use
1198    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
1199    
1200    ----------------------------------------------------------------------
1201    Name: Matthias Blume
1202    Date: 2001/09/20 17:28:00 EDT
1203    Tag: blume-20010920-slowfp
1204    Description:
1205    
1206    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
1207    
1208    ----------------------------------------------------------------------
1209    Name: Matthias Blume
1210    Date: 2001/09/20 17:20:00 EDT
1211    Tag: blume-20010920-canonicalpaths
1212    Description:
1213    
1214    0. Updated the BOOT file (something that I forgot to do earlier).
1215    
1216    1. Small internal change to CM so that it avoids "/../" in filenames
1217       as much as possible (but only where it is safe).
1218    
1219    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
1220       that arguments that contain delimiters are passed through correctly.
1221       This change also means that all "special" arguments of the form
1222       @SMLxxx... must come first.
1223    
1224    3. Changed install script to put relative anchor names for tool commands
1225       into pathconfig.
1226    
1227    ----------------------------------------------------------------------
1228    Name: Matthias Blume
1229    Date: 2001/09/18 15:35:00 EDT
1230    Tag: blume-20010918-readme11036
1231    Description:
1232    
1233    Added README files.
1234    
1235    ----------------------------------------------------------------------
1236    Name: Matthias Blume
1237    Date: 2001/09/18 11:45:00 EDT
1238    Tag: Release_110_36 (retag)
1239    Description:
1240    
1241    Fixed mistake in config/preloads. Retagged as 110.36.
1242    
1243    ----------------------------------------------------------------------
1244    Name: Matthias Blume
1245    Date: 2001/09/18 09:40:00 EDT
1246    Tag: Release_110_36_orig (tag changed)
1247    Description:
1248    
1249    New version (110.36).  New bootfiles.
1250    
1251    ----------------------------------------------------------------------
1252    Name: Matthias Blume
1253    Date: 2001/09/14 16:15:00 EDT
1254    Tag: blume-20010914-x86fastfp
1255    Description:
1256    
1257    John committed some changes that Allen made, in particular a (hopefully)
1258    correctly working version of the x86-fp module.
1259    
1260    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
1261    flag to "true".  Everything seems to compile to a fixpoint ok, and
1262    "mandelbrot" speeds up by about 15%.
1263    
1264    ----------------------------------------------------------------------
1265    Name: Matthias Blume
1266    Date: 2001/09/13 11:20:00 EDT
1267    Tag: blume-20010913-minimal
1268    Description:
1269    
1270    1. Stefan Monnier's patch to fix a miscompilation problem that
1271       was brought to light by John Reppy's work on Moby.
1272    
1273    2. Implemented a minimal "structure Compiler" that contains just
1274       "version" and "architecture".  The minimal version will be
1275       available when the full version is not.  This is for backward-
1276       compatibility with code that wants to test Compiler.version.
1277    
1278    ----------------------------------------------------------------------
1279    Name: Matthias Blume
1280    Date: 2001/08/28 14:03:00 EDT
1281    Tag: blume-20010828-ml-lex
1282    Description:
1283    
1284    Fix for bug 1581, received from Neophytos Michael.
1285    
1286    ----------------------------------------------------------------------
1287    Name: Matthias Blume
1288    Date: 2001/08/27 11:20:00 EDT
1289    Tag: blume-20010827-readme11035
1290    Description:
1291    
1292    Fleshed out the README file for 110.35.
1293    
1294    ----------------------------------------------------------------------
1295    Name: Matthias Blume
1296    Date: 2001/08/24 17:10:00 EDT
1297    Tag: Release_110_35
1298    Description:
1299    
1300    New version number (110.35).  New bootfiles.
1301    
1302    ----------------------------------------------------------------------
1303    Name: Lal George
1304    Date: 2001/08/24 13:47:18 EDT 2001
1305    Tag: george-20010824-MLRISC-graphs
1306    Description:
1307    
1308     removed clusters from MLRISC completely and replaced with graphs.
1309    
1310    ----------------------------------------------------------------------
1311    Name: Matthias Blume
1312    Date: 2001/08/23 17:50:00 EDT
1313    Tag: blume-20010823-toplevel
1314    Description:
1315    
1316    - some reorganization of the code that implements various kinds of
1317      environments in the compiler (static, dynamic, symbolic, combined)
1318    - re-implemented the EnvRef module so that evalStream works properly
1319      (if the stream contains references to "use", "CM.make", etc.)
1320    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
1321    
1322    ----------------------------------------------------------------------
1323    Name: Matthias Blume
1324    Date: 2001/08/20 15:50 EDT
1325    Tag: blume20010820-slipup
1326    Description:
1327    
1328    I forgot to commit a few files.  Here they are...
1329    
1330    ----------------------------------------------------------------------
1331    Name: Matthias Blume
1332    Date: 2001/08/20 15:35:00 EDT
1333    Tag: blume-20010820-debugprof
1334    Description:
1335    
1336    !!!! NEW BOOTFILES !!!!
1337    
1338    This is another round of reorganizing the compiler sources.  This
1339    time the main goal was to factor out all the "instrumentation"
1340    passes (for profiling and backtracing) into their own library.
1341    The difficulty was to do it in such a way that it does not depend
1342    on elaborate.cm but only on elabdata.cm.
1343    
1344    Therefore there have been further changes to both elaborate.cm and
1345    elabdata.cm -- more "generic" things have been moved from the former
1346    to the latter.  As a result, I was forced to split the assignment
1347    of numbers indicating "primtyc"s into two portions: SML-generic and
1348    SML/NJ-specific.  Since it would have been awkward to maintain,
1349    I bit the bullet and actually _changed_ the mapping between these
1350    numbers and primtycs.  The bottom line of this is that you need
1351    a new set of bin- and bootfiles.
1352    
1353    I have built new bootfiles for all architectures, so doing a fresh
1354    checkout and config/install.sh should be all you need.
1355    
1356    The newly created library's name is
1357    
1358        $smlnj/viscomp/debugprof.cm
1359    
1360    and its sources live under
1361    
1362        src/compiler/DebugProf
1363    
1364    ----------------------------------------------------------------------
1365    Name: Matthias Blume
1366    Date: 2001/08/15 17:15:00 EDT
1367    Tag: blume-20010815-compreorg
1368    Description:
1369    
1370    This is a first cut at reorganizing the CM libraries that make up the
1371    core of the compiler.  The idea is to separate out pieces that could
1372    be used independently by tools, e.g., the parser, the typechecker, etc.
1373    
1374    The current status is a step in this direction, but it is not quite
1375    satisfactory yet.  Expect more changes in the future.
1376    
1377    Here is the current (new) organization...
1378    
1379        What used to be $smlnj/viscomp/core.cm is now divided into
1380        six CM libraries:
1381    
1382             $smlnj/viscomp/basics.cm
1383                           /parser.cm
1384                           /elabdata.cm
1385                           /elaborate.cm
1386                           /execute.cm
1387                           /core.cm
1388    
1389        The CM files for these libraries live under src/system/smlnj/viscomp.
1390        All these libraries are proxy libraries that contain precisely
1391        one CM library component.  Here are the locations of the components
1392        (all within the src/compiler tree):
1393    
1394             Basics/basics.cm
1395             Parse/parser.cm
1396             ElabData/elabdata.cm
1397             Elaborator/elaborate.cm
1398             Execution/execute.cm
1399             core.cm
1400    
1401         [This organization is the same that has been used already
1402         for a while for the architecture-specific parts of the visible
1403         compiler and for the old version of core.cm.]
1404    
1405         As you will notice, many source files have been moved from their
1406         respective original locations to a new home in one of the above
1407         subtrees.
1408    
1409         The division of labor between the new libraries is the following:
1410    
1411             basics.cm:
1412                - Simple, basic definitions that pertain to many (or all) of
1413                  the other libraries.
1414             parser.cm:
1415                - The SML parser, producing output of type Ast.dec.
1416                - The type family for Ast is also defined and exported here.
1417             elabdata.cm:
1418                - The datatypes that describe input and output of the elaborator.
1419                  This includes types, absyn, and static environments.
1420             elaborator.cm:
1421                - The SML/NJ type checker and elaborator.
1422                  This maps an Ast.dec (with a given static environment) to
1423                  an Absyn.dec (with a new static environment).
1424                - This libraries implements certain modules that used to be
1425                  structures as functors (to remove dependencies on FLINT).
1426             execute.cm:
1427                - Everything having to do with executing binary code objects.
1428                - Dynamic environments.
1429             core.cm:
1430                - SML/NJ-specific instantiations of the elaborator and MLRISC.
1431                - Top-level modules.
1432                - FLINT (this should eventually become its own library)
1433    
1434    Notes:
1435    
1436    I am not 100% happy with the way I separated the elaborator (and its
1437    data structures) from FLINT.  Two instances of the same problem:
1438    
1439        1. Data structures contain certain fields that carry FLINT-specific
1440           information.  I hacked around this using exn and the property list
1441           module from smlnj-lib.  But the fact that there are middle-end
1442           specific fields around at all is a bit annoying.
1443    
1444        2. The elaborator calculates certain FLINT-related information.  I tried
1445           to make this as abstract as I could using functorization, but, again,
1446           the fact that the elaborator has to perform calculations on behalf
1447           of the middle-end at all is not nice.
1448    
1449        3. Having to used exn and property lists is unfortunate because it
1450           weakens type checking.  The other alternative (parameterizing
1451           nearly *everything*) is not appealing, though.
1452    
1453    I removed the "rebinding =" warning hack because due to the new organization
1454    it was awkward to maintain it.  As a result, the compiler now issues some of
1455    these warnings when compiling init.cmi during bootstrap compilation. On
1456    the plus side, you also get a warning when you do, for example:
1457       val op = = Int32.+
1458    which was not the case up to now.
1459    
1460    I placed "assign" and "deref" into the _Core structure so that the
1461    code that deals with the "lazy" keyword can find them there.  This
1462    removes the need for having access to the primitive environment
1463    during elaboration.
1464    
1465    ----------------------------------------------------------------------
1466    Name: Matthias Blume
1467    Date: 2001/08/13
1468    Tag: blume-20010813-closures
1469    Description:
1470    
1471    This fix was sent to us by Zhong Shao.  It is supposed to improve the
1472    performance of certain loops by avoiding needless closure allocation.
1473    
1474    ----------------------------------------------------------------------
1475    Name: Lal George
1476    Date: 2001/07/31 10:03:23 EDT 2001
1477    Tag: george-20010731-x86-fmalloc
1478    Description: Fixed bug in x86 calls
1479    
1480        There was a bug where call instructions would mysteriously
1481        vanish. The call instruction had to be one that returned
1482        a floating point value.
1483    
1484    ----------------------------------------------------------------------
1485    Name: Lal George
1486    Date: 2001/07/19 16:36:29 EDT 2001
1487    Tag: george-20010719-simple-cells
1488    Description:
1489    
1490    I have dramatically simplified the interface for CELLS in MLRISC.
1491    
1492    In summary, the cells interface is broken up into three parts:
1493    
1494      1. CellsBasis : CELLS_BASIS
1495    
1496            CellsBasis is a top level structure and common for all
1497            architectures.  it contains the definitions of basic datatypes
1498            and utility  functions over these types.
1499    
1500      2. functor Cells() : CELLS
1501    
1502            Cells generates an interface for CELLS that incorporates the
1503            specific resources on the target architecture, such as the
1504            presence of special register classes, their number and size,
1505            and various useful substructures.
1506    
1507      3. <ARCH>CELLS
1508    
1509            e.g. SparcCells: SPARCCELLS
1510    
1511            <ARCH>CELLS usually contains additional bindings for special
1512            registers  on the architecture, such as:
1513    
1514                    val r0 : cell           (* register zero *)
1515                    val y : cell            (* Y register *)
1516                    val psr : cell          (* processor status register *)
1517                    ...
1518    
1519            The structure returned by applying the Cells functor is opened
1520            in this interface.
1521    
1522    The main implication of all this is that the datatypes for cells is
1523    split between CellsBasis and CELLS -- a fairly simple change for user
1524    code.
1525    
1526    In the old scheme the CELLS interface had a definitional binding of
1527    the form:
1528    
1529            signature CELLS = sig
1530    
1531               structure CellsBasis = CellsBasis
1532    
1533               ...
1534    
1535            end
1536    
1537    With all the sharing constraints that goes on in MLRISC, this old
1538    design  quickly leads to errors such as:
1539    
1540            "structure definition spec inside of sharing ... "
1541    
1542    
1543    and appears to require an unacceptable amount of sharing and where
1544    constraint hackery.
1545    
1546    I think this error message (the interaction of definitional specs and
1547    sharing) requires more explanation on our web page.
1548    
1549    ----------------------------------------------------------------------
1550    Name: Matthias Blume
1551    Date: 2001/07/19 15:00:00 EDT
1552    Tag: blume-20010719-libreorg
1553    Description:
1554    
1555    This update puts together a fairly extensive but straightforward change
1556    to the way the libraries that implement the interactive system are
1557    organized:
1558    
1559       The biggest change is the elimination of structure Compiler.  As a
1560       replacement for this structure, there is now a CM library
1561       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
1562       that exports all the substructures of the original structure Compiler
1563       directly.  So instead of saying Compiler.Foo.bar one now simply
1564       says Foo.bar.  (The CM libraries actually export a collection of
1565       structures that is richer than the collection of substructures of
1566       structure Compiler.)
1567    
1568       To make the transition smooth, there is a separate library called
1569       $smlnj/compiler/compiler.cm which puts together and exports the
1570       original structure Compiler (or at least something very close to it).
1571    
1572       There are five members of the original structure Compiler
1573       that are not exported directly but which instead became members
1574       of a new structure Backend (described by signature BACKEND).  These are:
1575       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
1576       Interact (: INTERACT), structure Machine (: MACHINE), and val
1577       architecture (: string).
1578    
1579       Structure Compiler.Version has become structure CompilerVersion.
1580    
1581       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
1582       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
1583       or x86, respectively.
1584       Each of these exports the same frontend structures that
1585       $smlnj/compiler.cm exports.  But they do not have a structure Backend
1586       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
1587       Hppa, PPC, Sparc, or X86, respectively.
1588    
1589       Library $smlnj/compiler/all.cm exports the union of the exports of
1590       $smlnj/compiler/<arch>.cm
1591    
1592       There are no structures <Arch>Compiler anymore, use
1593       $smlnj/compiler/<arch>.cm instead.
1594    
1595       Library host-compiler-0.cm is gone.  Instead, the internal library
1596       that instantiates CM is now called cm0.cm.  Selection of the host
1597       compiler (backend) is no longer done here but. (Responsibility for it
1598       now lies with $smlnj/compiler/current.cm.  This seems to be more
1599       logical.)
1600    
1601       Many individual files have been moved or renamed.  Some files have
1602       been split into multiple files, and some "dead" files have been deleted.
1603    
1604    Aside from these changes to library organization, there are also changes
1605    to the way the code itself is organized:
1606    
1607       Structure Binfile has been re-implemented in such a way that it no
1608       longer needs any knowledge of the compiler.  It exclusively deals
1609       with the details of binfile layout.  It no longer invokes the
1610       compiler (for the purpose of creating new prospective binfile
1611       content), and it no longer has any knowledge of how to interpret
1612       pickles.
1613    
1614       Structure Compile (: COMPILE) has been stripped down to the bare
1615       essentials of compilation.  It no longer deals with linking/execution.
1616       The interface has been cleaned up considerably.
1617    
1618       Utility routines for dealing with linking and execution have been
1619       moved into their own substructures.
1620    
1621       (The ultimate goal of these changes is to provide a light-weight
1622       binfile loader/linker (at least for, e.g., stable libraries) that
1623       does not require CM or the compiler to be present.)
1624    
1625    CM documentation has been updated to reflect the changes to library
1626    organization.
1627    
1628    ----------------------------------------------------------------------
1629    Name: Matthias Blume
1630    Date: 2001/07/10 17:30:00 EDT
1631    Tag: Release_110_34
1632    Description:
1633    
1634    Minor tweak to 110.34 (re-tagged):
1635    
1636      - README.html file added to CVS repository
1637      - runtime compiles properly under FreeBSD 3.X and 4.X
1638    
1639    ----------------------------------------------------------------------
1640    Name: Matthias Blume
1641    Date: 2001/07/10 17:30:00 EDT
1642    Tag: Release_110_34
1643    Description:
1644    
1645    New version number (110.34). New bootfiles.
1646    
1647    ----------------------------------------------------------------------
1648    Name: Matthias Blume
1649    Date: 2001/07/09 16:00:00 EDT
1650    Tag: blume-20010709-more-varargs
1651    Description:
1652    
1653    I changed the handling of varargs in ml-nlffigen again:
1654    The ellipsis ... will now simply be ignored (with an accompanying warning).
1655    
1656    The immediate effect is that you can actually call a varargs function
1657    from ML -- but you can't actually supply any arguments beyond the ones
1658    specified explicitly.  (For example, you can call printf with its format
1659    string, but you cannot pass additional arguments.)
1660    
1661    This behavior is only marginally more useful than the one before, but
1662    it has the advantage that a function or, more importantly, a function
1663    type never gets dropped on the floor, thus avoiding follow-up problems with
1664    other types that refer to the offending one.
1665    
1666    ----------------------------------------------------------------------
1667    Name: Matthias Blume
1668    Date: 2001/07/09 11:25:00 EDT
1669    Tag: blume-20010709-varargs
1670    Description:
1671    
1672    1. ckit-lib.cm now exports structure Error
1673    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
1674       with a warning accompanied by a source location.  Moreover, it
1675       merely skips the offending function or type and proceeds with the
1676       rest of its work.u  As a result, one can safely feed C code containing
1677       "..." to ml-nlffigen.
1678    3. There are some internal improvements to CM, providing slightly
1679       more general string substitutions in the tools subsystem.
1680    
1681    ----------------------------------------------------------------------
1682    Name: Matthias Blume
1683    Date: 2001/06/27 15:10:00 EDT
1684    Tag: blume-20010627-concur
1685    Description:
1686    
1687    Fixed a small bug in CM's handling of parallel compilation.
1688    (You could observe the bug by Control-C-interrupting an ordinary
1689    CMB.make or CM.stabilize and then attaching some compile servers.
1690    The result was that all of a sudden the previously interrupted
1691    compilation would continue on its own.  This was because of
1692    an over-optimization: CM did not bother to clean out certain queues
1693    when no servers were attached "anyway", resulting in the contents
1694    of these queues to grab control when new servers did get attached.)
1695    
1696    There is also another minor update to the CM manual.
1697    
1698    ----------------------------------------------------------------------
1699    Name: Matthias Blume
1700    Date: 2001/06/26 16:15:00 EDT
1701    Tag: blume-20010626-cmdoc
1702    Description:
1703    
1704    Minor typo fixed in CM manual (syntax diagram for libraries).
1705    
1706    ----------------------------------------------------------------------
1707    Name: Matthias Blume
1708    Date: 2001/06/25 22:55:00 EDT
1709    Tag: blume-20010625-x86pc
1710    Description:
1711    
1712    Fixed a nasty bug in the X86 assembly code that caused signal
1713    handlers to fail (crash) randomly.
1714    
1715    ----------------------------------------------------------------------
1716    Name: Matthias Blume
1717    Date: 2001/06/25 12:05:00 EDT
1718    Tag: blume-20010625-nlffigen
1719    Description:
1720    
1721    This update fixes a number of minor bugs in ml-nlffigen as reported by
1722    Nick Carter <nbc@andrew.cmu.edu>.
1723    
1724      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
1725      2. Default names for generated files are now derived from the name of
1726         the C file *without its directory*.  In particular, this causes generated
1727         files to be placed locally even if the C file is in some system directory.
1728      3. Default names for generated signatures and structures are also derived
1729         from the C file name without its directory.  This avoids silly things
1730         like "structure GL/GL".
1731         (Other silly names are still possible because ml-nlffigen does not do
1732          a thorough check of whether generated names are legal ML identifiers.
1733          When in doubt, use command line arguments to force particular names.)
1734    
1735    ----------------------------------------------------------------------
1736    Name: Matthias Blume
1737    Date: 2001/06/21 12:25:00 EDT
1738    Tag: blume-20010621-eXene
1739    Description:
1740    
1741    eXene now compiles and (sort of) works again.
1742    
1743    The library name (for version > 110.33) is $/eXene.cm.
1744    
1745    I also added an new example in src/eXene/examples/nbody.  See the
1746    README file there for details.
1747    
1748    ----------------------------------------------------------------------
1749    Name: Matthias Blume
1750    Date: 2001/06/20 16:40:00 EDT
1751    Tag: blume-20010620-cml
1752    Description:
1753    
1754    CML now compiles and works again.
1755    
1756    Libraries (for version > 110.33):
1757    
1758      $cml/cml.cm            Main CML library.
1759      $cml/basis.cm          CML's version of $/basis.cm.
1760      $cml/cml-internal.cm   Internal helper library.
1761      $cml/core-cml.cm       Internal helper library.
1762      $cml-lib/trace-cml.cm  Tracing facility.
1763      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
1764    
1765    The installer (config/install.sh) has been taught how to properly
1766    install this stuff.
1767    
1768    ----------------------------------------------------------------------
1769    Name: Matthias Blume
1770    Date: 2001/06/19 17:55:00 EDT
1771    Tag: blume-20010619-instantiate
1772    Description:
1773    
1774    This un-breaks the fix for bug 1432.
1775    (The bug was originally fixed in 110.9 but I broke it again some
1776    time after that.)
1777    
1778    ----------------------------------------------------------------------
1779    Name: Matthias Blume
1780    Date: 2001/06/19 17:25:00 EDT
1781    Tag: blume-20010619-signals
1782    Description:
1783    
1784    This should (hopefully) fix the long-standing signal handling bug.
1785    (The runtime system was constructing a continuation record with an
1786    incorrect descriptor which would cause the GC to drop data on the floor...)
1787    
1788    ----------------------------------------------------------------------
1789    Name: Matthias Blume
1790    Date: 2001/06/15 15:05:00 EDT
1791    Tag: blume-20010615-moresparc
1792    Description:
1793    
1794    Here is a short late-hour update related to Sparc c-calls:
1795    
1796     -- made handling of double-word arguments a bit smarter
1797    
1798     -- instruction selection phase tries to collapse certain clumsily
1799        constructed ML-Trees; typical example:
1800    
1801            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
1802    
1803        This currently has no further impact on SML/NJ since mlriscGen does
1804        not seem to generate such patterns in the first place, and c-calls
1805        (which did generate them in the beginning) has meanwhile been fixed
1806        so as to avoid them as well.
1807    
1808    ----------------------------------------------------------------------
1809    Name: Matthias Blume
1810    Date: 2001/06/15 15:05:00 EDT
1811    Tag: blume-20010615-sparc
1812    Description:
1813    
1814    The purpose of this update is to provide an implementation of NLFFI
1815    on Sparc machines.
1816    
1817    Here are the changes in detail:
1818    
1819       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
1820       the Sparc implementation of the c-calls API.
1821       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
1822       for accessing the ML frame.  Thus, we have a real frame pointer and
1823       can freely modify %sp without need for an omit-frame-ptr phase.
1824       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
1825       this case.
1826       * ml-nlffigen has been taught to produce code for different architectures
1827       and calling conventions.
1828       * In a way similar to what was done in the x86 case, the Sparc
1829       backend uses its own specific extension to mltree.  (For example,
1830       it needs to be able to generate UNIMP instructions which are part
1831       of the calling convention.)
1832       * ml-nlffi-lib was reorganized to make it more modular (in particular,
1833       to make it easier to plug in new machine- and os-dependent parts).
1834    
1835    There are some other fairly unrelated bug fixes and cleanups as well:
1836    
1837       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
1838       that they properly share their libraries with existing SML/NJ libraries.
1839       * I fixed a minor cosmetic bug in CM, supressing certain spurious
1840       follow-up error messages.
1841       * Updates to CM/CMB documentation.
1842    
1843    TODO items:
1844    
1845       * MLRISC should use a different register as its asmTemp on the Sparc.
1846         (The current %o2 is a really bad choice because it is part of the
1847         calling conventions, so things might interfere in unexpected ways.)
1848    
1849    ----------------------------------------------------------------------
1850    Name: Matthias Blume
1851    Date: 2001/06/07
1852    Tag: blume-20010607-calls
1853    Description:
1854    
1855    A number of internal changes related to C calls and calling conventions:
1856    
1857    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
1858       number of bytes popped implicitly (by the callee).  In most cases
1859       this field is 0 but on x86/win32 it is some non-zero value.  This
1860       is information provided for the benefit of the "omit-frameptr" pass.
1861    2. The CALL instruction on the x86 carries a similar "pops" field.
1862       The instruction selection phase copies its value from the ML-Tree
1863       CALL statement.
1864    3. On all other architectures, the instruction selection phase checks
1865       whether "pops=0" and complains if not.
1866    4. The c-calls implementation for x86 now accepts two calling conventions:
1867       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
1868       up after the call and pops is set to 0.  For "stdcall", the caller
1869       does nothing, leaving the cleanup to the callee; pops is set to
1870       the number of bytes that were pushed onto the stack.
1871    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1872       distinguish between "ccall" and "stdcall".
1873    6. The UNIMP instruction has been added to the supported Sparc instruction
1874       set. (This is needed for implementing the official C calling convention
1875       on this architecture.)
1876    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1877       work with the latest CM.
1878    
1879    ----------------------------------------------------------------------
1880    Name: Matthias Blume
1881    Date: 2001/06/05 15:10:00 EDT
1882    Tag: blume-20010605-cm-index
1883    Description:
1884    
1885    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1886    
1887    1. CM can now generate "index files".  These are human-readable files
1888       that list on a per-.cm-file basis each toplevel symbol defined or
1889       imported.  The location of the index file for
1890       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1891       To enable index-file generation, set CM.Control.generate_index to true
1892       or export an environment-symbol: export CM_GENERATE_INDEX=true.
1893    
1894       The CM manual has been updated accordingly.
1895    
1896    2. I made some slight modifications to the c-calls API in MLRISC.
1897    
1898         a) There is now a callback to support saving/restoring of
1899            dedicated but caller-save registers around the actual call
1900            instruction.
1901         b) One can optionally specify a comment-annotation for the
1902            call instruction.
1903    
1904    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1905       (For example, the comment annotation shows the C prototype of
1906        the function being called.)
1907    
1908    ----------------------------------------------------------------------
1909    Name: Matthias Blume
1910    Date: 2001/06/01 13:30:00 EDT
1911    Tag: blume-20010601-nlffi-cleanup
1912    Description:
1913    
1914    This is mostly a cleanup of MLFFI stuff:
1915    
1916       - some signature files have been put into a more exposed place
1917       - the ugly 'f type parameter is gone (simplifies types tremendously!)
1918       - ml-nlffigen changed accordingly
1919       - tutorial updated
1920    
1921    Other changes:
1922    
1923       - author's affiliation in CM manual(s) updated
1924       - some more recognized keywords added to Allen's sml.sty
1925    
1926    ----------------------------------------------------------------------
1927    Name: Matthias Blume
1928    Date: 2001/05/25 15:30:00 EDT
1929    Tag: blume-20010525-iptr
1930    Description:
1931    
1932      - put the official 110.33-README (as it appears on the ftp server) under
1933        CVS
1934      - fixed a small bug related to incomplete pointer types in
1935        ml-nlffigen
1936      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1937        (it does not need the 'f type parameter)
1938    
1939    ----------------------------------------------------------------------
1940    Name: Matthias Blume
1941    Date: 2001/05/23 14:30:00 EDT
1942    Tag: Release_110_33
1943    Description:
1944    
1945    New version number (110.33).  New bootfiles.
1946    
1947    ----------------------------------------------------------------------
1948    Name: Matthias Blume
1949    Date: 2001/05/22 18:06:00 EDT
1950    Tag: blume-20010522-targets
1951    Description:
1952    
1953    Made install.sh use file config/targets.customized if it exists, falling
1954    back to config/targets if it doesn't.  This way one can have a customized
1955    version of the targets file without touching the "real thing", thus
1956    eliminating the constant fear of accidentally checking something bogus
1957    back into the CVS repository...  (File config/targets.customized must
1958    not be added to the repository!)
1959    
1960    ----------------------------------------------------------------------
1961    Name: Matthias Blume
1962    Date: 2001/05/22 16:30:00 EDT
1963    Tag: blume-20010522-minitut
1964    Description:
1965    
1966    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1967       struct returns.
1968    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
1969       incomplete, preliminary documentation for NLFFI.
1970    
1971    ----------------------------------------------------------------------
1972    Name: Matthias Blume
1973    Date: 2001/05/14 11:30:00 EDT
1974    Tag: blume-20010514-script
1975    Description:
1976    
1977    Some bugs in install script fixed.
1978    
1979    In addition to that I also made a slight change to the NLFFI API:
1980    Functors generated by ml-nlffigen now take the dynamic library as a
1981    straight functor argument, not as a suspended one.  (The original
1982    functor code used to force the suspension right away anyway, so there
1983    was nothing gained by this complication of the interface.)
1984    
1985    ----------------------------------------------------------------------
1986    Name: Matthias Blume
1987    Date: 2001/05/11 14:35:00 EDT
1988    Tag: blume-20010511-ml-nlffi
1989    Description:
1990    
1991    I finally took the plunge and added my new FFI code to the main
1992    repository.  For x86-linux it is now ready for prime-time.
1993    
1994    There are two new subdirectories of "src":
1995    
1996      - ml-nlffi-lib:
1997           The utility library for programs using the FFI interface.
1998           Here is the implementation of $/c.cm and its associated low-level
1999           partners $/c-int.cm and $/memory.cm.
2000      - ml-nlffigen:
2001           A stand-alone program for generating ML glue code from C source
2002           code.
2003    
2004    Building ml-nlffigen requires $/ckit-lib.cm.
2005    
2006    The config/install.sh script has been updates to do the Right Thing
2007    (hopefully).
2008    
2009    Notice that the source tree for the C-Kit will not be put under "src"
2010    but directly under the installation root directory.  (This is the
2011    structure that currently exists on the CVS server when you check out
2012    module "sml".)  Fortunately, config/install.sh knows about this oddity.
2013    
2014    Bugs: No documentation yet.
2015    
2016    ----------------------------------------------------------------------
2017    Name: Matthias Blume
2018    Date: 2001/05/09 16:35:00 EDT
2019    Tag: blume-20010509-cpscontract
2020    Description:
2021    
2022    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
2023    wrapper/unwrapper elimination did not decrement usage counts and some
2024    dead variables got overlooked by the dead-up logic.)
2025    
2026    ----------------------------------------------------------------------
2027    Name: Lal George
2028    Date: 2001/05/08  17:26:09 EDT
2029    Tag: george-20010508-omit-frameptr
2030    Description:
2031    
2032    Changes to implement the omit-frame-pointer optimization to support
2033    raw C calls. For now, there is only support on the Intel x86, but
2034    other architectures will follow as more experience is gained with this.
2035    
2036    
2037    ----------------------------------------------------------------------
2038    Name: Matthias Blume
2039    Date: 2001/05/07 14:40:00 EDT
2040    Tag: blume-20010507-proxies
2041    Description:
2042    
2043    I made into "proxy libraries" all libraries that qualify for such a
2044    change.  (A qualifying library is a library that has another library or
2045    groups as its sole member and repeats that member's export list
2046    verbatim.  A proxy library avoids this repetition by omitting its export
2047    list, effectively inheriting the list that its (only) member exports.
2048    See the CM manual for more explanation.)
2049    The main effect is that explicit export lists for these libraries
2050    do not have to be kepts in sync, making maintenance a bit easier.
2051    
2052    I also added copyright notices to many .cm-files.
2053    
2054    Last but not least, I made a new set of bootfiles.
2055    
2056    ----------------------------------------------------------------------
2057    Name: Matthias Blume
2058    Date: 2001/05/04 17:00:00 EDT
2059    Tag: blume-20010504-cm-lsplit
2060    Description:
2061    
2062    0. John merged pending changes to $/smlnj-lib.cm
2063    
2064    1. Allen's previous change accidentally backed out of one of Lal's
2065       earlier changes.  I undid this mistake (re-introducing Lal's change).
2066    
2067    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
2068       within the compiler where applicable.  There is some code simplification
2069       because of that.
2070    
2071    3. The "split" phase (in FLINT) is now part of the default list of phases.
2072       Compiler.Control.LambdaSplitting.* can be used to globally control the
2073       lambda-splitting (cross-module-inlining) engine.  In addition to that,
2074       it can now also be controlled on a per-source basis: CM has been taught
2075       a new tool parameter applicable to ML source files.
2076    
2077       - To turn lambda-splitting off completely:
2078            local open Compiler.Control.LambdaSplitting in
2079                val _ = set Off
2080            end
2081       - To make "no lambda-splitting" the global default (but allow per-source
2082         overriding); this is the initial setting:
2083            local open Compiler.Control.LambdaSplitting in
2084                val _ = set (Default NONE)
2085            end
2086       - To make "lambda-splitting with aggressiveness a" the global default
2087         (and allow per-source overriding):
2088            local open Compiler.Control.LambdaSplitting in
2089                val _ = set (Default (SOME a))
2090            end
2091    
2092       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
2093         write (in the respective .cm-file):
2094            a.sml (lambdasplitting:off)
2095       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
2096            a.sml (lambdasplitting:on)
2097       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
2098         <a> is a decimal non-negative integer):
2099            a.sml (lambdasplitting:<a>)
2100       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
2101            a.sml (lambdasplitting:infinity)
2102       - To use the global default for a.sml:
2103            a.sml (lambdasplitting:default)
2104         or simply
2105            a.sml
2106    
2107    ----------------------------------------------------------------------
2108    Name: Allen Leung
2109    Date: 2001/05/04 01:57:00 EDT
2110    Tag: leunga-20010504-sync
2111    Description:
2112    
2113      MLRISC features.
2114    
2115      1. Fix to CMPXCHG instructions.
2116      2. Changed RA interface to allow annotations in callbacks.
2117      3. Added a new method to the stream interface to allow annotations updates.
2118    
2119    ----------------------------------------------------------------------
2120  Name: Matthias Blume  Name: Matthias Blume
2121  Date: 2001/05/01 11:45:00 EDT  Date: 2001/05/01 11:45:00 EDT
2122  Tag: blume-20010501-pcedittmp  Tag: blume-20010501-pcedittmp
# Line 2098  Line 4202 
4202       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
4203       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
4204       Please, don't be too harsh on me for messing with this code a bit more       Please, don't be too harsh on me for messing with this code a bit more
4205       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
4206       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
4207       Dave's hands. :)       Dave's hands. :)
4208    

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