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Diff of /sml/trunk/NOTES/HISTORY

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revision 763, Sat Dec 23 09:20:02 2000 UTC revision 839, Thu Jun 7 20:28:44 2001 UTC
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11  Date:  Date:
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    
15    ----------------------------------------------------------------------
16    Name: Matthias Blume
17    Date: 2001/06/07
18    Tag: blume-20010607-calls
19    Description:
20    
21    A number of internal changes related to C calls and calling conventions:
22    
23    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
24       number of bytes popped implicitly (by the callee).  In most cases
25       this field is 0 but on x86/win32 it is some non-zero value.  This
26       is information provided for the benefit of the "omit-frameptr" pass.
27    2. The CALL instruction on the x86 carries a similar "pops" field.
28       The instruction selection phase copies its value from the ML-Tree
29       CALL statement.
30    3. On all other architectures, the instruction selection phase checks
31       whether "pops=0" and complains if not.
32    4. The c-calls implementation for x86 now accepts two calling conventions:
33       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
34       up after the call and pops is set to 0.  For "stdcall", the caller
35       does nothing, leaving the cleanup to the callee; pops is set to
36       the number of bytes that were pushed onto the stack.
37    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
38       distinguish between "ccall" and "stdcall".
39    6. The UNIMP instruction has been added to the supported Sparc instruction
40       set. (This is needed for implementing the official C calling convention
41       on this architecture.)
42    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
43       work with the latest CM.
44    
45    ----------------------------------------------------------------------
46    Name: Matthias Blume
47    Date: 2001/06/05 15:10:00 EDT
48    Tag: blume-20010605-cm-index
49    Description:
50    
51    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
52    
53    1. CM can now generate "index files".  These are human-readable files
54       that list on a per-.cm-file basis each toplevel symbol defined or
55       imported.  The location of the index file for
56       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
57       To enable index-file generation, set CM.Control.generate_index to true
58       or export an environment-symbol: export CM_GENERATE_INDEX=true.
59    
60       The CM manual has been updated accordingly.
61    
62    2. I made some slight modifications to the c-calls API in MLRISC.
63    
64         a) There is now a callback to support saving/restoring of
65            dedicated but caller-save registers around the actual call
66            instruction.
67         b) One can optionally specify a comment-annotation for the
68            call instruction.
69    
70    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
71       (For example, the comment annotation shows the C prototype of
72        the function being called.)
73    
74    ----------------------------------------------------------------------
75    Name: Matthias Blume
76    Date: 2001/06/01 13:30:00 EDT
77    Tag: blume-20010601-nlffi-cleanup
78    Description:
79    
80    This is mostly a cleanup of MLFFI stuff:
81    
82       - some signature files have been put into a more exposed place
83       - the ugly 'f type parameter is gone (simplifies types tremendously!)
84       - ml-nlffigen changed accordingly
85       - tutorial updated
86    
87    Other changes:
88    
89       - author's affiliation in CM manual(s) updated
90       - some more recognized keywords added to Allen's sml.sty
91    
92    ----------------------------------------------------------------------
93    Name: Matthias Blume
94    Date: 2001/05/25 15:30:00 EDT
95    Tag: blume-20010525-iptr
96    Description:
97    
98      - put the official 110.33-README (as it appears on the ftp server) under
99        CVS
100      - fixed a small bug related to incomplete pointer types in
101        ml-nlffigen
102      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
103        (it does not need the 'f type parameter)
104    
105    ----------------------------------------------------------------------
106    Name: Matthias Blume
107    Date: 2001/05/23 14:30:00 EDT
108    Tag: Release_110_33
109    Description:
110    
111    New version number (110.33).  New bootfiles.
112    
113    ----------------------------------------------------------------------
114    Name: Matthias Blume
115    Date: 2001/05/22 18:06:00 EDT
116    Tag: blume-20010522-targets
117    Description:
118    
119    Made install.sh use file config/targets.customized if it exists, falling
120    back to config/targets if it doesn't.  This way one can have a customized
121    version of the targets file without touching the "real thing", thus
122    eliminating the constant fear of accidentally checking something bogus
123    back into the CVS repository...  (File config/targets.customized must
124    not be added to the repository!)
125    
126    ----------------------------------------------------------------------
127    Name: Matthias Blume
128    Date: 2001/05/22 16:30:00 EDT
129    Tag: blume-20010522-minitut
130    Description:
131    
132    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
133       struct returns.
134    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
135       incomplete, preliminary documentation for NLFFI.
136    
137    ----------------------------------------------------------------------
138    Name: Matthias Blume
139    Date: 2001/05/14 11:30:00 EDT
140    Tag: blume-20010514-script
141    Description:
142    
143    Some bugs in install script fixed.
144    
145    In addition to that I also made a slight change to the NLFFI API:
146    Functors generated by ml-nlffigen now take the dynamic library as a
147    straight functor argument, not as a suspended one.  (The original
148    functor code used to force the suspension right away anyway, so there
149    was nothing gained by this complication of the interface.)
150    
151    ----------------------------------------------------------------------
152    Name: Matthias Blume
153    Date: 2001/05/11 14:35:00 EDT
154    Tag: blume-20010511-ml-nlffi
155    Description:
156    
157    I finally took the plunge and added my new FFI code to the main
158    repository.  For x86-linux it is now ready for prime-time.
159    
160    There are two new subdirectories of "src":
161    
162      - ml-nlffi-lib:
163           The utility library for programs using the FFI interface.
164           Here is the implementation of $/c.cm and its associated low-level
165           partners $/c-int.cm and $/memory.cm.
166      - ml-nlffigen:
167           A stand-alone program for generating ML glue code from C source
168           code.
169    
170    Building ml-nlffigen requires $/ckit-lib.cm.
171    
172    The config/install.sh script has been updates to do the Right Thing
173    (hopefully).
174    
175    Notice that the source tree for the C-Kit will not be put under "src"
176    but directly under the installation root directory.  (This is the
177    structure that currently exists on the CVS server when you check out
178    module "sml".)  Fortunately, config/install.sh knows about this oddity.
179    
180    Bugs: No documentation yet.
181    
182    ----------------------------------------------------------------------
183    Name: Matthias Blume
184    Date: 2001/05/09 16:35:00 EDT
185    Tag: blume-20010509-cpscontract
186    Description:
187    
188    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
189    wrapper/unwrapper elimination did not decrement usage counts and some
190    dead variables got overlooked by the dead-up logic.)
191    
192    ----------------------------------------------------------------------
193    Name: Lal George
194    Date: 2001/05/08  17:26:09 EDT
195    Tag: george-20010508-omit-frameptr
196    Description:
197    
198    Changes to implement the omit-frame-pointer optimization to support
199    raw C calls. For now, there is only support on the Intel x86, but
200    other architectures will follow as more experience is gained with this.
201    
202    
203    ----------------------------------------------------------------------
204    Name: Matthias Blume
205    Date: 2001/05/07 14:40:00 EDT
206    Tag: blume-20010507-proxies
207    Description:
208    
209    I made into "proxy libraries" all libraries that qualify for such a
210    change.  (A qualifying library is a library that has another library or
211    groups as its sole member and repeats that member's export list
212    verbatim.  A proxy library avoids this repetition by omitting its export
213    list, effectively inheriting the list that its (only) member exports.
214    See the CM manual for more explanation.)
215    The main effect is that explicit export lists for these libraries
216    do not have to be kepts in sync, making maintenance a bit easier.
217    
218    I also added copyright notices to many .cm-files.
219    
220    Last but not least, I made a new set of bootfiles.
221    
222    ----------------------------------------------------------------------
223    Name: Matthias Blume
224    Date: 2001/05/04 17:00:00 EDT
225    Tag: blume-20010504-cm-lsplit
226    Description:
227    
228    0. John merged pending changes to $/smlnj-lib.cm
229    
230    1. Allen's previous change accidentally backed out of one of Lal's
231       earlier changes.  I undid this mistake (re-introducing Lal's change).
232    
233    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
234       within the compiler where applicable.  There is some code simplification
235       because of that.
236    
237    3. The "split" phase (in FLINT) is now part of the default list of phases.
238       Compiler.Control.LambdaSplitting.* can be used to globally control the
239       lambda-splitting (cross-module-inlining) engine.  In addition to that,
240       it can now also be controlled on a per-source basis: CM has been taught
241       a new tool parameter applicable to ML source files.
242    
243       - To turn lambda-splitting off completely:
244            local open Compiler.Control.LambdaSplitting in
245                val _ = set Off
246            end
247       - To make "no lambda-splitting" the global default (but allow per-source
248         overriding); this is the initial setting:
249            local open Compiler.Control.LambdaSplitting in
250                val _ = set (Default NONE)
251            end
252       - To make "lambda-splitting with aggressiveness a" the global default
253         (and allow per-source overriding):
254            local open Compiler.Control.LambdaSplitting in
255                val _ = set (Default (SOME a))
256            end
257    
258       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
259         write (in the respective .cm-file):
260            a.sml (lambdasplitting:off)
261       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
262            a.sml (lambdasplitting:on)
263       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
264         <a> is a decimal non-negative integer):
265            a.sml (lambdasplitting:<a>)
266       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
267            a.sml (lambdasplitting:infinity)
268       - To use the global default for a.sml:
269            a.sml (lambdasplitting:default)
270         or simply
271            a.sml
272    
273    ----------------------------------------------------------------------
274    Name: Allen Leung
275    Date: 2001/05/04 01:57:00 EDT
276    Tag: leunga-20010504-sync
277    Description:
278    
279      MLRISC features.
280    
281      1. Fix to CMPXCHG instructions.
282      2. Changed RA interface to allow annotations in callbacks.
283      3. Added a new method to the stream interface to allow annotations updates.
284    
285    ----------------------------------------------------------------------
286    Name: Matthias Blume
287    Date: 2001/05/01 11:45:00 EDT
288    Tag: blume-20010501-pcedittmp
289    Description:
290    
291    Changed install.sh to use the current working directory instead of
292    /usr/tmp for a temporary file (pcedittmp).  The previous choice
293    of /usr/tmp caused trouble with MacOS X because of file premission
294    problems.
295    
296    ----------------------------------------------------------------------
297    Name: Matthias Blume
298    Date: 2001/04/20 11:10:00 EDT
299    Tag: blume-20010420-inMLflag
300    Description:
301    
302     - added vp_limitPtrMask to vproc-state.h
303       (for use by the raw-C-calls mechanism to implement proper interrupt
304        handling)
305     - made the ML compiler aware of various data-structure offsets so it
306       can generate code for accessing the vp_inML flag and vp_limitPtrMask
307     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
308       raw C-calls
309    
310    ----------------------------------------------------------------------
311    Name: Lal George
312    Date: 2001/04/20 09:15:28 EDT
313    Tag: george-20010420-macosX
314    Description:
315    
316     - Changes to port to Mac OS X; Darwin.
317    
318     - In the process I found that sqrt was broken on the PPC, because the
319       fsqrt instruction is not implemented.
320    
321    ----------------------------------------------------------------------
322    Name: Matthias Blume
323    Date: 2001/04/18 12:45:00 EDT
324    Tag: blume-20010418-ccalls
325    Description:
326    
327     - fixed two off-by-4 errors in the x86-specific c-calls implementation
328       (this bug prevented structure arguments containing pointers from being
329        passed correctly)
330     - changed the raw-C-call code in mlriscGen.sml in such a way that
331       structure arguments are represented as a pointer to the beginning
332       of the structure (instead of having a series of synthesized arguments,
333       one for each structure member)
334    
335     - made makeml script's verbosity level configurable via environment
336       variable (MAKEML_VERBOSITY)
337    
338     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
339       in rawmem-x86.sml; we are now using the real thing
340    
341    ----------------------------------------------------------------------
342    Name: Matthias Blume
343    Date: 2001/03/22 16:25:00 EST
344    Tag: blume-20010322-bootfiles
345    Description:
346    
347    Created a new set of bootfiles (for your automatic installation convenience).
348    
349    ----------------------------------------------------------------------
350    Name: Matthias Blume
351    Date: 2001/03/22 15:10:00 EST
352    Tag: blume-20010322-rawmem-parcm
353    Description:
354    
355    1. All "raw memory access" primitives for the new FFI are implemented now
356       (at least on the x86).
357    2. Some further cleanup of CM's parallel make mechanism.
358    
359    ----------------------------------------------------------------------
360    Name: Matthias Blume
361    Date: 2001/03/19 17:53:00 EST
362    Tag: blume-20010319-parallel
363    Description:
364    
365    Parallel make (using compile servers) now works again.
366    
367    To this end, CM.stabilize and CMB.make have been modified to work in
368    two passes when compile servers are attached:
369       1. Compile everything, do not perform stabilization; this pass
370          uses compile servers
371       2. Stabilize everything; this pass does not use compile servers
372    If there are no compile servers, the two passes are combined into one
373    (as before).  Splitting the passes increases the inherent parallelism
374    in the dependency graph because the entire graph including all
375    libraries is available at the same time.  This, in turn, improves
376    server utilization.  The downside is that the master process will
377    have to do some extra work after compilation is done (because for
378    technical reasons it must re-read all the binfiles during stabilization).
379    
380    ----------------------------------------------------------------------
381    Name: Matthias Blume
382    Date: 2001/03/16 12:22:00 EST
383    Tag: blume-20010316-bootfiles
384    Description:
385    
386    Created a new set of bootfiles (for your automatic installation convenience).
387    
388    ----------------------------------------------------------------------
389    Name: Matthias Blume
390    Date: 2001/03/16 11:00:00 EST
391    Tag: blume-20010316-MLTREE-fixup
392    Description:
393    
394    This is a minor fixup for an (untagged) earlier commit by Allen.
395    (A file was missing).
396    
397    ----------------------------------------------------------------------
398    Name: Allen Leung
399    Date: Mon Mar  5 18:54:57 EST 2001
400    Tag: leunga-20010305-cut-support
401    
402    1. New support for alternative control-flow in MLTREE.
403       Currently we support
404    
405          FLOW_TO(CALL ...., [k1,...,kn])
406    
407       This is needed for 'cuts to' in C-- and try/handle-like constructs
408       in Moby
409    
410       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
411    
412    2. Register Allocator
413    
414       Changes in interface [from Fermin, John]
415    
416    3. Alpha 8-bit SLL support [Fermin]
417    
418    4. All architectures
419    
420       A new module (ClusterExpandCopies) for expanding parallel copies.
421    
422    ----------------------------------------------------------------------
423    Name: Allen Leung
424    Date: 2001/02/27 23:07:00 EST
425    Tag: leunga-20010227-minor-stuff
426    
427    1. Alpha bug fix for CMOVNE
428    2. Handle mltree COND(..,FCMP ...,...)
429    3. Bug fix in simplifier
430    
431    ----------------------------------------------------------------------
432    Name: Matthias Blume
433    Date: 2001/01/30 17:50:00 EST
434    Tag: blume-20010130-sync
435    Description:
436    
437    This is just a minor update to sync my devel branch with the main brach.
438    The only visible change is the addition of some README files.
439    
440    ----------------------------------------------------------------------
441    Name: Matthias Blume
442    Date: 2001/01/12 23:30:00 JST
443    Tag: blume-20010112-bootfiles
444    Description:
445    
446    Made a new set of bootfiles that goes with the current state of the
447    repository.
448    
449    ----------------------------------------------------------------------
450    Name: Matthias Blume
451    Date: 2001/01/12 21:20:00 JST
452    Tag: blume-20010112-sync
453    Description:
454    
455    I am just flushing out some minor changes that had accumulated in
456    my private branch in order to sync with the main tree.  (This is
457    mainly because I had CVS trouble when trying to merge _into_ my
458    private branch.)
459    
460    Most people should be completely unaffected by this.
461    
462    ----------------------------------------------------------------------
463    Name: Allen Leung
464    Date: Thu Jan 11 21:03:00 EST 2001
465    Tag: leunga-20010111-labexp=mltree
466    Description:
467    
468    1.  Removed the type LabelExp and replace it by MLTree.
469    2.  Rewritten mltree-simplify with the pattern matcher tool.
470    3.  There were some bugs in alpha code generator which would break
471        64-bit code generation.
472    4.  Redo the tools to generate code with the
473    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
474        are now generated by perl scripts.
475    
476    ----------------------------------------------------------------------
477    Name: Matthias Blume
478    Date: 2001/01/10 21:55:00 JST
479    Tag: blume-20010110-rcc
480    Description:
481    
482    The RCC stuff now seems to work (but only on the x86).
483    This required hacking of the c-calls interface (and -implementation) in
484    MLRISC.
485    
486    Normal compiler users should be unaffected.
487    
488    ----------------------------------------------------------------------
489    Name: Matthias Blume
490    Date: 2001/01/09 01:20:00 JST
491    Tag: blume-20010109-rcc
492    Description:
493    
494    This is a fairly big patch, flushing out a large number of pending
495    changes that I made to my development copy over the last couple of days.
496    
497    Of practical relevance at this moment is a workaround for a pickling
498    bug that Allen ran into the other day.  The cause of the bug itself is
499    still unknown and it might be hard to fix it properly, but the
500    workaround has some merits of its own (namely somewhat reducing pickling
501    overhead for certain libraries).  Therefore, I think this solution should
502    be satisfactory at this time.
503    
504    The rest of the changes (i.e., the vast majority) has to do with my
505    ongoing efforts of providing direct support for C function calls from
506    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
507    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
508    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
509    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
510    handle RCC.
511    
512    The last part (the changes to mlriscGen.sml) are still known to be
513    wrong on the x86 and not implemented on all other architectures.  But
514    the infrastructure is in place. I had to change a few functor
515    signatures in the backend to be able to route the CCalls interface
516    from MLRISC there, and I had to specialize the mltree type (on the
517    x86) to include the necessary extensions. (The extensions themselves
518    were already there and redy to go in MLRISC/x86).
519    
520    Everything should be very happy as soon as someone helps me with
521    mlriscGen.sml...
522    
523    In any case, nothing of this should matter to anyone as long as the
524    new primop is not being used (which is going to be the case unless you
525    find it where I hid it :). The rest of the compiler is completely
526    unaffected.
527    
528    ----------------------------------------------------------------------
529    Name: Matthias Blume
530    Date: 2001/01/05 00:30:00 JST
531    Tag: blume-20010105-primops
532    Description:
533    
534    Added some experimental support for work that I am doing right now.
535    These changes mostly concern added primops, but there is also a new
536    experimental C library in the runtime system (but currently not enabled
537    anywhere except on Linux/X86).
538    
539    In the course of adding primops (and playing with them), I discovered that
540    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
541    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
542    To recover, I made type information in INL_PRIM mandatory and changed
543    prim.sml as well as built-in.sml accordingly.  The InLine structure now
544    has complete, correct type information (i.e., no bottom types).
545    
546    Since all these changes mean that we need new binfiles, I also bumped the
547    version number to 110.32.1.
548    
549    ----------------------------------------------------------------------
550    Name: Matthias Blume
551    Date: 2000/12/30 22:10:00 JST
552    Tag: blume-20001230-various
553    Description:
554    
555    Added proxy libraries for MLRISC and let MLRISC libraries refer
556    to each other using path anchors.  (See CM manual for explanation.)
557    
558    Updated CM documentation.
559    
560    Fixed some bugs in CM.
561    
562    Implemented "proxy" libraries (= syntactic sugar for CM).
563    
564    Added "-quiet" option to makeml and changed runtime system accordingly.
565    
566    Added cleanup handler for exportML to reset timers and compiler stats.
567    
568  ----------------------------------------------------------------------  ----------------------------------------------------------------------
569  Name: Lal George  Name: Lal George
570  Date: 2000/12/22 22:22:58 EST 2000  Date: 2000/12/22 22:22:58 EST 2000

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