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Diff of /sml/trunk/HISTORY

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revision 675, Fri Jun 23 09:18:18 2000 UTC revision 1317, Tue Apr 8 20:42:37 2003 UTC
# Line 8  Line 8 
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: Matthias Blume
17    Date: 2003/04/08 15:42:00 CDT
18    Tag: blume-20030408-listpair
19    Description:
20    
21    1. Added a target 'mlrisc' to installer.
22    
23    2. Added missing elements to structure ListPair.
24    
25    ----------------------------------------------------------------------
26    Name: Allen Leung
27    Date: 2003/01/07 10:40:00 EST
28    Tag: leunga-20030107-int-rem
29    Description:
30    
31    Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
32    The arguments to the SUBL instruction were swapped.
33    
34    ----------------------------------------------------------------------
35    Name: Matthias Blume
36    Date: 2002/12/12 16:25:00 EST
37    Tag: blume-20021212-risc-ra
38    Description:
39    
40    Fixed a serious bug in the rewrite code for FP spilling/reloading that
41    sent the RA into an infinite loop when floating point registers get
42    spilled.  (Because of this bug, e.g., nucleic stopped compiling between
43    110.37 and 110.38.)
44    There was another set of potential problems related to the handling of
45    MLRISC annotations (but those did not yet cause real problems, apparently).
46    
47    ----------------------------------------------------------------------
48    Name: Matthias Blume
49    Date: 2002/12/06 22:40:00 EST
50    Tag: blume-20021206-cm-fileid
51    Description:
52    
53    Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
54    This fixes the problem of CM getting confused by files that suddenly
55    change their identity (e.g., by getting unlinked and recreated by some
56    text editor such as vi).  There might be a better/cheaper/cleaner way
57    of doing this, but for now this will have to do.
58    
59    ----------------------------------------------------------------------
60    Name: Matthias Blume
61    Date: 2002/10/28 09:50:00 EST
62    Tag: blume-20021028-typecheck
63    Description:
64    
65    Exported structure Typecheck from $smlnj/viscomp/core.cm.
66    
67    ----------------------------------------------------------------------
68    Name: Matthias Blume
69    Date: 2002/10/17 09:10:00 EDT
70    Tag: Release_110_42
71    Description:
72    
73    In good old tradition, there has been a slight hiccup so that we have
74    to patch 110.42 after the fact.   The old release tag has been replaced
75    (see below).
76    
77    The change solves a problem with two competing approaches the
78    configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
79    each other's way.
80    
81    This change only affects the runtime system code and the installer script.
82    (No new bootfiles.)
83    
84    ----------------------------------------------------------------------
85    Name: Matthias Blume
86    Date: 2002/10/16 12:00:00 EDT
87    Tag: Release_110_42_removed
88    Description:
89    
90    New working release.  New bootfiles.
91    
92    ----------------------------------------------------------------------
93    Name: Matthias Blume
94    Date: 2002/10/10 13:10:00 EDT
95    Tag: blume-20021010-ppc-divs
96    Description:
97    
98    The mltree operator DIVS must be implemented with an overflow check on
99    the PPC because the hardware indicates divide-by-zero using "overflow" as
100    well.
101    
102    ----------------------------------------------------------------------
103    Name: Matthias Blume
104    Date: 2002/07/23 11:45:00
105    Tag: blume-20020723-smlnj-home
106    Description:
107    
108    Sml now senses the SMLNJ_HOME environment variable.  If this is set,
109    then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
110    CM_PATHCONFIG is also set), the path configuration file is assumed
111    to be in $SMLNJ_HOME/lib/pathconfig.  This way one can easily move
112    the entire tree to some other place and everything will "just work".
113    
114    (Companion commands such as ml-build and ml-makedepend also sense this
115    variable.)
116    
117    ----------------------------------------------------------------------
118    Name: Matthias Blume
119    Date: 2002/07/12 21:19:00 EDT
120    Tag: blume-20020712-liveness
121    Description:
122    
123    Exported two useful "step" functions from liveness module (MLRISC).
124    
125    ----------------------------------------------------------------------
126    Name: Matthias Blume
127    Date: 2002/07/05 16:00 EDT
128    Tag: Release_110_41
129    Description:
130    
131    New working release.  New bootfiles.
132    
133    ----------------------------------------------------------------------
134    Name: Matthias Blume
135    Date: 2002/07/05 10:25:00 EDT
136    Tag: blume-20020705-btimp
137    Description:
138    
139    Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
140    other clients can set up backtracing support.
141    
142    ----------------------------------------------------------------------
143    Name: Matthias Blume
144    Date: 2002/06/25 17:23:00 EDT
145    Tag: blume-20020625-fpmax
146    Description:
147    
148    Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
149    case.  (The sense of the isNaN test was reversed -- which made min and
150    max always return their first argument.)
151    
152    ----------------------------------------------------------------------
153    Name: Matthias Blume
154    Date: 2002/06/11
155    Tag: blume-20020611-unixpath
156    Description:
157    
158    Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
159    
160    ----------------------------------------------------------------------
161    Name: Matthias Blume
162    Date: 2002/06/10 16:35:00 EDT
163    Tag: blume-20020610-ieeereal
164    Description:
165    
166    I back-ported my implementation of IEEEReal.fromString from the
167    idlbasis-devel branch so that we can test it.
168    
169    Another small change is that ppDec tries to give more information
170    than just "<sig>" in the case of functors.  However, this code is
171    broken in some mysterious way if the functor's body's signature
172    has not been declared by ascription but gets inferred from the
173    implementation.  This needs fixing...
174    
175    ----------------------------------------------------------------------
176    Name: Matthias Blume
177    Date: 2002/05/31
178    Tag: blume-20020531-btrace-mode
179    Description:
180    
181    Resurrected SMLofNJ.Internals.BTrace.mode.  (It accidentally fell by
182    the wayside when I switched over to using Controls everywhere.)
183    
184    ----------------------------------------------------------------------
185    Name: Lal George
186    Date: 2002/05/23 12:21:40 EDT
187    Tag: george-20020523-visual-labels
188    Description:
189    
190    Labels are now displayed in the graphical output to make
191    the fall-through and target blocks obvious.
192    
193    ----------------------------------------------------------------------
194    Name: Matthias Blume
195    Date: 2002/05/22 11:03:00 EDT
196    Tag: blume-20020522-shrink
197    Description:
198    
199    John tweaked yesterday's fix for 1131 to handle an out-of-memory
200    situation that comes up when allocating huge arrays.
201    
202    ----------------------------------------------------------------------
203    Name: Matthias Blume
204    Date: 2002/05/21 16:00:00 EDT
205    Tag: Release_110_40
206    Description:
207    
208    New working release (110.40).  New bootfiles.
209    
210    [Also: John Reppy fixed GC bug 1131.]
211    
212    ----------------------------------------------------------------------
213    Name: Matthias Blume
214    Date: 2002/05/21 12:35:00 EDT
215    Tag: blume-20020521-cmdoc
216    Description:
217    
218    CM documentation update.
219    
220    ----------------------------------------------------------------------
221    Name: Matthias Blume
222    Date: 2002/05/21 10:55:00 EDT
223    Tag: blume-20020521-misc
224    Description:
225    
226    - John tweaked runtime to be silent on heap export (except when
227      GC messages are on).
228    - I added a few more things (cross-compiling versions of CMB) to
229      config/preloads (as suggestions).
230    
231    ----------------------------------------------------------------------
232    Name: Matthias Blume
233    Date: 2002/05/20 22:25:00 EDT
234    Tag: blume-20020520-controls
235    Description:
236    
237    - Added ControlUtil structure to control-lib.cm.
238    - Use it throughout.
239    - Used Controls facility to define MLRISC controls (as opposed to
240      registering MLRISC control ref cells with Controls after the fact)
241    - Fixed messed-up controls priorities.
242    
243    * Removed again all the stuff from config/preloads that one wouldn't
244      be able to preload at the time the initial heap image is built.
245      (Many libraries, e.g., CML, do not exist yet at this time.  The
246       only libraries that can be preloaded via config/preloads are those
247       that come bundled with the bootfiles.)
248    
249    ----------------------------------------------------------------------
250    Name: Matthias Blume
251    Date: 2002/05/20 10:59:00 EDT
252    Tag: blume-20020520-preloads
253    Description:
254    
255    Added a lot of commented-out suggestions for things to be included
256    in config/preloads.
257    
258    ----------------------------------------------------------------------
259    Name: Allen Leung
260    Date: 2002/05/18 14:20:00 EDT
261    Tag: leunga-20020518-mdl
262    Description:
263    
264    o Made the mdl tool stuff compile and run again.
265    o I've disabled all the stuff that depends on RTL specifications; they
266      are all badly broken anyway.
267    
268    ----------------------------------------------------------------------
269    Name: Matthias Blume
270    Date: 2002/05/17 16:49:00 EDT
271    Tag: blume-20020517-controls
272    Description:
273    
274    0. John Reppy made several modifications to the SML/NJ library.
275       In particular, there is a shiny new controls-lib.cm.
276    
277    1. Pushed new controls interface through compiler so that everything
278       compiles again.
279    
280    2. Added FormatComb and FORMAT_COMB to the CML version of the
281       SML/NJ library (so that CML compiles again).
282    
283    3. Modified init scripts because XXX_DEFAULT environment variables
284       are no longer with us.  (Boot-time initialization is now done
285       using the same environment variables that are also used for
286       startup-time initialization of controls.)
287    
288    ----------------------------------------------------------------------
289    Name: Lal George
290    Date: 2002/05/15 09:20:10 EDT
291    Tag: george-20020515-pseudo-op-decls
292    Description:
293    
294            All pseudo-ops emitted before the first segment declaration
295    such as TEXT, DATA, and BSS directives are assumed to be global
296    declarations and are emitted first in the assembly file. This is
297    useful in a number of situations where one has pseudo-ops that are not
298    specific to any segment, and also works around the constraint that one
299    cannot have client pseudo-ops in the TEXT segment.
300    
301            Because no segment is associated with these declarations it is
302    an error to allocate any space or objects before the first segment
303    directive and an exception will be raised. However, we cannot make
304    this check for client pseudo-ops.
305    
306            These top level declarations are a field in the CFG graph_info.
307    In theory you can continue to add to this field after the CFG has been
308    built -- provided you know what you are doing;-)
309    
310    ----------------------------------------------------------------------
311    Name: Matthias Blume
312    Date: 2002/05/13 16:40:00 EDT
313    Tag: blume-20020513-pp-etc
314    Description:
315    
316    A few minor bugfixes:
317    
318      - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
319        (Bogus printouts for redefined bindings still occur.  Compiler
320        bug should no longer occur now.  We need to redo the prettyprinter
321        from scratch.)
322    
323      - CM pathname printer now also adds escape sequences for ( and )
324    
325      - commend and docu fixes for ml-nlffi
326    
327    ----------------------------------------------------------------------
328    Name: Matthias Blume
329    Date: 2002/05/10 16:40:00 EDT
330    Tag: blume-20020510-erg-textio
331    Description:
332    
333    Applied the following bugfix provided by Emden Gansner:
334    
335        Output is corrupted when outputSubstr is used rather than output.
336    
337        The problem occurs when a substring
338    
339            ss = (s, dataStart, dataLen)
340    
341        where dataStart > 0, fills a stream buffer with avail bytes left.
342        avail bytes of s, starting at index dataStart, are copied into the
343        buffer, the buffer is flushed, and then the remaining dataLen-avail
344        bytes of ss are copied into the beginning of the buffer. Instead of
345        starting this copy at index dataStart+avail in s, the current code
346        starts the copy at index avail.
347    
348        Fix:
349        In text-io-fn.sml, change line 695 from
350             val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
351        to
352             val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
353    
354    ----------------------------------------------------------------------
355    Name: Matthias Blume
356    Date: 2002/04/12 13:55:00 EDT
357    Tag: blume-20020412-assyntax
358    Description:
359    
360    1. Grabbed newer assyntax.h from the XFree86 project.
361    2. Fiddled with how to compile X86.prim.asm without warnings.
362    3. (Very) Minor cleanup in CM.
363    
364    ----------------------------------------------------------------------
365    Name: Matthias Blume
366    Date: 2002/04/01 (no joke!) 17:07:00 EST
367    Tag: blume-20020401-x86div
368    Description:
369    
370    Added full support for div/mod/rem/quot on the x86, using the machine
371    instruction's two results (without clumsily recomputing the remainder)
372    directly where appropriate.
373    
374    Some more extensive power-of-two support was added to the x86 instruction
375    selector (avoiding expensive divs, mods, and muls where they can be
376    replaced with cheaper shifts and masks).  However, this sort of thing
377    ought to be done earlier, e.g., within the CPS optimizer so that
378    all architectures benefit from it.
379    
380    The compiler compiles to a fixed point, but changes might be somewhat
381    fragile nevertheless.  Please, report any strange things that you might
382    see wrt. div/mod/quot/rem...
383    
384    ----------------------------------------------------------------------
385    Name: Matthias Blume
386    Date: 2002/03/29 17:22:00
387    Tag: blume-20020329-div
388    Description:
389    
390    Fixed my broken div/mod logic.  Unfortunately, this means that the
391    inline code for div/mod now has one more comparison than before.
392    Fast paths (quotient > 0 or remainder = 0) are not affected, though.
393    The problem was with quotient = 0, because that alone does not tell
394    us which way the rounding went.  One then has to look at whether
395    remainder and divisor have the same sign...  :(
396    
397    Anyway, I replaced the bootfiles with fresh ones...
398    
399    ----------------------------------------------------------------------
400    Name: Matthias Blume
401    Date: 2002/03/29 14:10:00 EST
402    Tag: blume-20020329-inlprims
403    Description:
404    
405    NEW BOOTFILES!!!    Version number bumped to 110.39.3.
406    
407    Primops have changed. This means that the bin/boot-file formats have
408    changed as well.
409    
410    To make sure that there is no confusion, I made a new version.
411    
412    
413    CHANGES:
414    
415    * removed REMT from mltree (remainder should never overflow).
416    
417    * added primops to deal with divisions of all flavors to the frontend
418    
419    * handled these primops all the way through so they map to their respective
420      MLRISC support
421    
422    * used these primops in the implementation of Int, Int32, Word, Word32
423    
424    * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
425    
426    * parameterized INLMIN, INLMAX, and INLABS by a numkind
427    
428    * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
429      floating point
430    
431    * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
432      and Real (but Real.abs maps to a separate floating-point-only primop)
433    
434    
435    TODO items:
436    
437    * Hacked Alpha32 instruction selection, disabling the selection of REMx
438      instructions because the machine instruction encoder cannot handle
439      them.  (Hppa, PPC, and Sparc instruction selection did not handle
440      REM in the first place, and REM is supported by the x86 machine coder.)
441    
442    * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
443      selection phase.  (The two can be streamlined because the hardware
444      delivers both quotient and remainder at the same time anyway.)
445    
446    * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
447      (Currently the behavior is inconsistent both across architectures and
448      wrt. the draft Basis spec.)
449    
450    * Word8 should eventually be handled natively, too.
451    
452    * There seems to be one serious bug in mltree-gen.sml.  It appears, though,
453      as if there currently is no execution path that could trigger it in
454      SML/NJ.  (The assumptions underlying functions arith and promotable do not
455      hold for things like multiplication and division.)
456    
457    ----------------------------------------------------------------------
458    Name: Matthias Blume
459    Date: 2002/03/27 16:27:00 EST
460    Tag: blume-20020327-mlrisc-divisions
461    Description:
462    
463    Added support for all four division operations (ML's div, mod, quot,
464    and rem) to MLRISC.  In the course of doing so, I also rationalized
465    the naming (no more annoying switch-around of DIV and QUOT), by
466    parameterizing the operation by div_rounding_mode (which can be either
467    DIV_TO_ZERO or DIV_TO_NEGINF).
468    
469    The generic MLTreeGen functor takes care of compiling all four
470    operations down to only round-to-zero div.
471    
472    Missing pieces:
473    
474      * Doing something smarter than relying on MLTreeGen on architectures
475        like, e.g., the x86 where hardware division delivers both quotient and
476        remainder at the same time.  With this, the implementation of the
477        round-to-neginf operations could be further streamlined.
478    
479      * Remove inlining support for div/mod/rem from the frontend and replace it
480        with primops that get carried through to the backend.  Do this for all
481        int and word types.
482    
483    ----------------------------------------------------------------------
484    Name: Matthias Blume
485    Date: 2002/03/25 17:25:00 EST
486    Tag: blume-20020325-divmod
487    Description:
488    
489    I improved (hopefully without breaking them) the implementation of Int.div,
490    Int.mod, and Int.rem.   For this, the code in translate.sml now takes
491    advantage of the following observations:
492    
493      Let  q = x quot y      r = x rem y
494           d = x div  y      m = x mod y
495    
496    where "quot" is the round-to-zero version of integer division that
497    hardware usually provides.  Then we have:
498    
499         r = x - q * y        where neither the * nor the - will overflow
500         d = if q >= 0 orelse x = q * y then q else q - 1
501                              where neither the * nor the - will overflow
502         m = if q >= 0 orelse r = 0 then r else r + y
503                              where the + will not overflow
504    
505    This results in substantial simplification of the generated code.
506    The following table shows the number of CFG nodes and edges generated
507    for
508            fun f (x, y) = x OPER y
509            (* with OPER \in div, mod, quot, rem *)
510    
511    
512        OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
513        --------------------------------------------------------
514         div |         24 |         39 |         12 |         16
515         mod |         41 |         71 |         12 |         16
516        quot |          8 |         10 |          8 |         10
517         rem |         10 |         14 |          8 |         10
518    
519    
520    ----------------------------------------------------------------------
521    Name: Matthias Blume
522    Date: 2002/03/25 22:06:00 EST
523    Tag: blume-20020325-cprotobug
524    Description:
525    
526    Fixed a bug in cproto (c prototype decoder).
527    
528    ----------------------------------------------------------------------
529    Name: Matthias Blume
530    Date: 2002/03/25 16:00:00 EST
531    Tag: blume-20020325-raw-primops
532    Description:
533    
534    I did some cleanup to Allen's new primop code and
535    replaced yesterday's bootfiles with new ones.
536    (But they are stored in the same place.)
537    
538    ----------------------------------------------------------------------
539    Name: Matthias Blume
540    Date: 2002/03/24 22:40:00 EST
541    Tag: blume-20020324-bootfiles
542    Description:
543    
544    Made the bootfiles that Allen asked for.
545    
546    ----------------------------------------------------------------------
547    Name: Allen Leung
548    Date: 2002/03/23 15:50:00 EST
549    Tag: leunga-20020323-flint-cps-rcc-primops
550    Description:
551    
552      1. Changes to FLINT primops:
553    
554        (* make a call to a C-function;
555         * The primop carries C function prototype information and specifies
556         * which of its (ML-) arguments are floating point. C prototype
557         * information is for use by the backend, ML information is for
558         * use by the CPS converter. *)
559      | RAW_CCALL of { c_proto: CTypes.c_proto,
560                       ml_args: ccall_type list,
561                       ml_res_opt: ccall_type option,
562                       reentrant : bool
563                     } option
564       (* Allocate uninitialized storage on the heap.
565        * The record is meant to hold short-lived C objects, i.e., they
566        * are not ML pointers.  With the tag, the representation is
567        * the same as RECORD with tag tag_raw32 (sz=4), or tag_fblock (sz=8)
568        *)
569      | RAW_RECORD of {tag:bool,sz:int}
570      and ccall_type = CCALL_INT32 | CCALL_REAL64 | CCALL_ML_PTR
571    
572      2.  These CPS primops are now overloaded:
573    
574           rawload of {kind:numkind}
575           rawstore of {kind:numkind}
576    
577          The one argument form is:
578    
579             rawload {kind} address
580    
581          The two argument form is:
582    
583             rawload {kind} [ml object, byte-offset]
584    
585      3. RAW_CCALL/RCC now takes two extra arguments:
586    
587         a. The first is whether the C call is reentrant, i.e., whether
588            ML state should be saved and restored.
589         b. The second argument is a string argument specifying the name of
590            library and the C function.
591    
592         These things are currently not handled in the code generator, yet.
593    
594      4. In CProto,
595    
596         An encoding type of "bool" means "ml object" and is mapped into
597         C prototype of PTR.  Note that "bool" is different than "string",
598         even though "string" is also mapped into PTR, because "bool"
599         is assigned an CPS type of BOGt, while "string" is assigned INT32t.
600    
601      5. Pickler/unpicker
602    
603         Changed to handle RAW_RECORD and newest RAW_CCALL
604    
605      6. MLRiscGen,
606    
607         1. Changed to handle the new rawload/rawstore/rawrecord operators.
608         2. Code for handling C Calls has been moved to a new module CPSCCalls,
609            in the file CodeGen/cpscompile/cps-c-calls.sml
610    
611      7. Added the conditional move operator
612    
613             condmove of branch
614    
615         to cps.  Generation of this is still buggy so it is currently
616         disabled.
617    
618    ----------------------------------------------------------------------
619    Name: Lal George
620    Date: 2002/03/22 14:18:25 EST
621    Tag: george-20020322-cps-branch-prob
622    Description:
623    
624    Implemented the Ball-Larus branch prediction-heuristics, and
625    incorporated graphical viewers for control flow graphs.
626    
627    Ball-Larus Heuristics:
628    ---------------------
629    See the file compiler/CodeGen/cpscompile/cpsBranchProb.sml.
630    
631    By design it uses the Dempster-Shafer theory for combining
632    probabilities.  For example, in the function:
633    
634        fun f(n,acc) = if n = 0 then acc else f(n-1, n*acc)
635    
636    the ball-larus heuristics predicts that the n=0 is unlikely
637    (OH-heuristic), and the 'then' branch is unlikely because of the
638    RH-heuristic -- giving the 'then' branch an even lower combined
639    probability using the Dempster-Shafer theory.
640    
641    Finally, John Reppy's loop analysis in MLRISC, further lowers the
642    probability of the 'then' branch because of the loop in the else
643    branch.
644    
645    
646    Graphical Viewing:
647    ------------------
648    I merely plugged in Allen's graphical viewers into the compiler. The
649    additional code is not much. At the top level, saying:
650    
651            Control.MLRISC.getFlag "cfg-graphical-view" := true;
652    
653    will display the graphical view of the control flow graph just before
654    back-patching.  daVinci must be in your path for this to work. If
655    daVinci is not available, then the default viewer can be changed
656    using:
657    
658            Control.MLRISC.getString "viewer"
659    
660    which can be set to "dot" or "vcg" for the corresponding viewers. Of
661    course, these viewers must be in your path.
662    
663    The above will display the compilation unit at the level of clusters,
664    many of which are small, boring, and un-interesting. Also setting:
665    
666            Control.MLRISC.getInt "cfg-graphical-view_size"
667    
668    will display clusters that are larger than the value set by the above.
669    
670    
671    ----------------------------------------------------------------------
672    Name: Matthias Blume
673    Date: 2002/03/21 22:20:00 EST
674    Tag: blume-20020321-kmp-bugfix
675    Description:
676    
677    Changed the interface to the KMP routine in PreString and fixed
678    a minor bug in one place where it was used.
679    
680    ----------------------------------------------------------------------
681    Name: Allen Leung
682    Date: 2002/03/21 20:30:00 EST
683    Tag: leunga-20020321-cfg
684    Description:
685    
686      Fixed a potential problem in cfg edge splitting.
687    
688    ----------------------------------------------------------------------
689    Name: Allen Leung
690    Date: 2002/03/21 17:15:00 EST
691    Tag: leunga-20020321-x86-fp-cfg
692    Description:
693    
694      1. Recoded the buggy parts of x86-fp.
695    
696         a. All the block reordering code has been removed.
697            We now depend on the block placement phases to do this work.
698    
699         b. Critical edge splitting code has been simplified and moved into the
700            CFG modules, as where they belong.
701    
702         Both of these were quite buggy and complex.  The code is now much, much
703         simpler.
704    
705      2. X86 backend.
706    
707         a. Added instructions for 64-bit support.  Instruction selection for
708            64-bit has not been committed, however, since that
709            requires changes to MLTREE which haven't been approved by
710            Lal and John.
711    
712         b. Added support for FUCOMI and FUCOMIP when generating code for
713            PentiumPro and above.  We only generate these instructions in
714            the fast-fp mode.
715    
716         c. Added cases for JP and JNP in X86FreqProps.
717    
718      3. CFG
719    
720         CFG now has a bunch of methods for edge splitting and merging.
721    
722      4. Machine description.
723    
724         John's simplification of MLTREE_BASIS.fcond broke a few machine
725         description things:
726    
727         rtl-build.{sig,sml} and hppa.mdl fixed.
728    
729         NOTE: the machine description stuff in the repository is still broken.
730               Again, I can't put my fixes in because that involves
731               changes to MLTREE.
732    
733    ----------------------------------------------------------------------
734    Name: Matthias Blume
735    Date: 2002/03/20 15:55:00 EST
736    Tag: blume-20020320-kmp
737    Description:
738    
739    Implemented Knuth-Morris-Pratt string matching in PreString and used
740    it for String.isSubstring, Substring.isSubstring, and
741    Substring.position.
742    
743    (Might need some stress-testing.  Simple examples worked fine.)
744    
745    ----------------------------------------------------------------------
746    Name: Matthias Blume
747    Date: 2002/03/19 16:37:00 EST
748    Tag: blume-20020319-witnesses
749    Description:
750    
751    Added a structure C.W and functions convert/Ptr.convert to ml-nlffi-lib.
752    
753    This implements a generic mechanism for changing constness qualifiers
754    anywhere within big C types without resorting to outright "casts".
755    (So far, functions such as C.rw/C.ro or C.Ptr.rw/C.Ptr.ro only let you
756    modify the constness at the outermost level.)
757    The implementation of "convert" is based on the idea of "witness"
758    values -- values that are not used by the operation but whose types
759    "testify" to their applicability.  On the implementation side, "convert"
760    is simply a projection (returning its second curried argument).  With
761    cross-module inlining, it should not result in any machine code being
762    generated.
763    
764    ----------------------------------------------------------------------
765    Name: Matthias Blume
766    Date: 2002/03/15 16:40:00 EST
767    Tag: blume-20020315-basis
768    Description:
769    
770    Provided (preliminary?) implementations for
771    
772      {String,Substring}.{concatWith,isSuffix,isSubstring}
773    
774    and
775    
776      Substring.full
777    
778    Those are in the Basis spec but they were missing in SML/NJ.
779    
780    ----------------------------------------------------------------------
781    Name: Matthias Blume
782    Date: 2002/03/14 21:30:00 EST
783    Tag: blume-20020314-controls
784    Description:
785    
786    Controls:
787    ---------
788    
789    1. Factored out the recently-added Controls : CONTROLS stuff and put
790       it into its own library $/controls-lib.cm.  The source tree for
791       this is under src/smlnj-lib/Controls.
792    
793    2. Changed the names of types and functions in this interface, so they
794       make a bit more "sense":
795    
796          module -> registry
797          'a registry -> 'a group
798    
799    3. The interface now deals in ref cells only.  The getter/setter interface
800       is (mostly) gone.
801    
802    4. Added a function that lets one register an already-existing ref cell.
803    
804    5. Made the corresponding modifications to the rest of the code so that
805       everything compiles again.
806    
807    6. Changed the implementation of Controls.MLRISC back to something closer
808       to the original.  In particular, this module (and therefore MLRISC)
809       does not depend on Controls.  There now is some link-time code in
810       int-sys.sml that registers the MLRISC controls with the Controls
811       module.
812    
813    CM:
814    ---
815    
816      * One can now specify the lambda-split aggressiveness in init.cmi.
817    
818    ----------------------------------------------------------------------
819    Name: Allen Leung
820    Date: 2002/03/13 17:30:00 EST
821    Tag: leunga-20020313-x86-fp-unary
822    Description:
823    
824    Bug fix for:
825    
826    > leunga@weaselbane:~/Yale/tmp/sml-dist{21} bin/sml
827    > Standard ML of New Jersey v110.39.1 [FLINT v1.5], March 08, 2002
828    > - fun f(x,(y,z)) = Real.~ y;
829    > [autoloading]
830    > [autoloading done]
831    >       fchsl   (%eax), 184(%esp)
832    > Error: MLRisc bug: X86MCEmitter.emitInstr
833    >
834    > uncaught exception Error
835    >   raised at: ../MLRISC/control/mlriscErrormsg.sml:16.14-16.19
836    
837    The problem was that the code generator did not generate any fp registers
838    in this case, and the ra didn't know that it needed to run the X86FP phase to
839    translate the pseudo fp instruction.   This only happened with unary fp
840    operators in certain situations.
841    
842    ----------------------------------------------------------------------
843    Name: Matthias Blume
844    Date: 2002/03/13 14:00:00 EST
845    Tag: blume-20020313-overload-etc
846    Description:
847    
848    1. Added _overload as a synonym for overload for backward compatibility.
849       (Control.overloadKW must be true for either version to be accepted.)
850    
851    2. Fixed bug in install script that caused more things to be installed
852       than what was requested in config/targets.
853    
854    3. Made CM aware of the (_)overload construct so that autoloading
855       works.
856    
857    ----------------------------------------------------------------------
858    Name: Matthias Blume
859    Date: 2002/03/12 22:03:00 EST
860    Tag: blume-20020312-url
861    Description:
862    
863    Forgot to update BOOT and srcarchiveurl.
864    
865    ----------------------------------------------------------------------
866    Name: Matthias Blume
867    Date: 2002/03/12 17:30:00 EST
868    Tag: blume-20020312-version110392
869    Description:
870    
871    Yet another version number bump (because of small changes to the
872    binfile format).  Version number is now 110.39.2.  NEW BOOTFILES!
873    
874    Changes:
875    
876      The new pid generation scheme described a few weeks ago was overly
877      complicated.  I implemented a new mechanism that is simpler and
878      provides a bit more "stability":  Once CM has seen a compilation
879      unit, it keeps its identity constant (as long as you do not delete
880      those crucial CM/GUID/* files).  This means that when you change
881      an interface, compile, then go back to the old interface, and
882      compile again, you arrive at the original pid.
883    
884      There now also is a mechanism that instructs CM to use the plain
885      environment hash as a module's pid (effectively making its GUID
886      the empty string).  For this, "noguid" must be specified as an
887      option to the .sml file in question within its .cm file.
888      This is most useful for code that is being generated by tools such
889      as ml-nlffigen (because during development programmers tend to
890      erase the tool's entire output directory tree including CM's cached
891      GUIDs).  "noguid" is somewhat dangerous (since it can be used to locally
892      revert to the old, broken behavior of SML/NJ, but in specific cases
893      where there is no danger of interface confusion, its use is ok
894      (I think).
895    
896      ml-nlffigen by default generates "noguid" annotations.  They can be
897      turned off by specifying -guid in its command line.
898    
899    ----------------------------------------------------------------------
900    Name: Lal George
901    Date: 2002/03/12 12 14:42:36 EST
902    Tag: george-20020312-frequency-computation
903    Description:
904    
905    Integrated jump chaining and static block frequency into the
906    compiler. More details and numbers later.
907    
908    ----------------------------------------------------------------------
909    Name: Lal George
910    Date: 2002/03/11 11 22:38:53 EST
911    Tag: george-20020311-jump-chain-elim
912    Description:
913    
914    Tested the jump chain elimination on all architectures (except the
915    hppa).  This is on by default right now and is profitable for the
916    alpha and x86, however, it may not be profitable for the sparc and ppc
917    when compiling the compiler.
918    
919    The gc test will typically jump to a label at the end of the cluster,
920    where there is another jump to an external cluster containing the actual
921    code to invoke gc. This is to allow factoring of common gc invocation
922    sequences. That is to say, we generate:
923    
924            f:
925               testgc
926               ja   L1      % jump if above to L1
927    
928            L1:
929               jmp L2
930    
931    
932    After jump chain elimination the 'ja L1' instructions is converted to
933    'ja L2'. On the sparc and ppc, many of the 'ja L2' instructions may end
934    up being implemented in their long form (if L2 is far away) using:
935    
936            jbe     L3      % jump if below or equal to L3
937            jmp     L2
938         L3:
939            ...
940    
941    
942    For large compilation units L2  may be far away.
943    
944    
945    ----------------------------------------------------------------------
946    Name: Matthias Blume
947    Date: 2002/03/11 13:30:00 EST
948    Tag: blume-20020311-mltreeeval
949    Description:
950    
951    A functor parameter was missing.
952    
953    ----------------------------------------------------------------------
954    Name: Allen Leung
955    Date: 2002/03/11 10:30:00 EST
956    Tag: leunga-20020311-runtime-string0
957    Description:
958    
959       The representation of the empty string now points to a
960    legal null terminated C string instead of unit.  It is now possible
961    to convert an ML string into C string with InlineT.CharVector.getData.
962    This compiles into one single machine instruction.
963    
964    ----------------------------------------------------------------------
965    Name: Allen Leung
966    Date: 2002/03/10 23:55:00 EST
967    Tag: leunga-20020310-x86-call
968    Description:
969    
970       Added machine generation for CALL instruction (relative displacement mode)
971    
972    ----------------------------------------------------------------------
973    Name: Matthias Blume
974    Date: 2002/03/08 16:05:00
975    Tag: blume-20020308-entrypoints
976    Description:
977    
978    Version number bumped to 110.39.1.  NEW BOOTFILES!
979    
980    Entrypoints: non-zero offset into a code object where execution should begin.
981    
982    - Added the notion of an entrypoint to CodeObj.
983    - Added reading/writing of entrypoint info to Binfile.
984    - Made runtime system bootloader aware of entrypoints.
985    - Use the address of the label of the first function given to mlriscGen
986      as the entrypoint.  This address is currently always 0, but it will
987      not be 0 once we turn on block placement.
988    - Removed the linkage cluster code (which was The Other Way(tm) of dealing
989      with entry points) from mlriscGen.
990    
991    ----------------------------------------------------------------------
992    Name: Allen Leung
993    Date: 2002/03/07 20:45:00 EST
994    Tag: leunga-20020307-x86-cmov
995    Description:
996    
997       Bug fixes for CMOVcc on x86.
998    
999       1. Added machine code generation for CMOVcc
1000       2. CMOVcc is now generated in preference over SETcc on PentiumPro or above.
1001       3. CMOVcc cannot have an immediate operand as argument.
1002    
1003    ----------------------------------------------------------------------
1004    Name: Matthias Blume
1005    Date: 2002/03/07 16:15:00 EST
1006    Tag: blume-20020307-controls
1007    Description:
1008    
1009    This is a very large but mostly boring patch which makes (almost)
1010    every tuneable compiler knob (i.e., pretty much everything under
1011    Control.* plus a few other things) configurable via both the command
1012    line and environment variables in the style CM did its configuration
1013    until now.
1014    
1015    Try starting sml with '-h' (or, if you are brave, '-H')
1016    
1017    To this end, I added a structure Controls : CONTROLS to smlnj-lib.cm which
1018    implements the underlying generic mechanism.
1019    
1020    The interface to some of the existing such facilities has changed somewhat.
1021    For example, the MLRiscControl module now provides mkFoo instead of getFoo.
1022    (The getFoo interface is still there for backward-compatibility, but its
1023    use is deprecated.)
1024    
1025    The ml-build script passes -Cxxx=yyy command-line arguments through so
1026    that one can now twiddle the compiler settings when using this "batch"
1027    compiler.
1028    
1029    TODO items:
1030    
1031    We should go through and throw out all controls that are no longer
1032    connected to anything.  Moreover, we should go through and provide
1033    meaningful (and correct!) documentation strings for those controls
1034    that still are connected.
1035    
1036    Currently, multiple calls to Controls.new are accepted (only the first
1037    has any effect).  Eventually we should make sure that every control
1038    is being made (via Controls.new) exactly once.  Future access can then
1039    be done using Controls.acc.
1040    
1041    Finally, it would probably be a good idea to use the getter-setter
1042    interface to controls rather than ref cells.  For the time being, both
1043    styles are provided by the Controls module, but getter-setter pairs are
1044    better if thread-safety is of any concern because they can be wrapped.
1045    
1046    *****************************************
1047    
1048    One bug fix: The function blockPlacement in three of the MLRISC
1049    backpatch files used to be hard-wired to one of two possibilities at
1050    link time (according to the value of the placementFlag).  But (I
1051    think) it should rather sense the flag every time.
1052    
1053    *****************************************
1054    
1055    Other assorted changes (by other people who did not supply a HISTORY entry):
1056    
1057    1. the cross-module inliner now works much better (Monnier)
1058    2. representation of weights, frequencies, and probabilities in MLRISC
1059       changed in preparation of using those for weighted block placement
1060       (Reppy, George)
1061    
1062    ----------------------------------------------------------------------
1063    Name: Lal George
1064    Date: 2002/03/07 14:44:24 EST 2002
1065    Tag: george-20020307-weighted-block-placement
1066    
1067    Tested the weighted block placement optimization on all architectures
1068    (except the hppa) using AMPL to generate the block and edge frequencies.
1069    Changes were required in the machine properties to correctly
1070    categorize trap instructions. There is an MLRISC flag
1071    "weighted-block-placement" that can be used to enable weighted block
1072    placement, but this will be ineffective without block/edge
1073    frequencies (coming soon).
1074    
1075    
1076    ----------------------------------------------------------------------
1077    Name: Lal George
1078    Date: 2002/03/05 17:24:48 EST
1079    Tag: george-20020305-linkage-cluster
1080    
1081    In order to support the block placement optimization, a new cluster
1082    is generated as the very first cluster (called the linkage cluster).
1083    It contains a single jump to the 'real' entry point for the compilation
1084    unit. Block placement has no effect on the linkage cluster itself, but
1085    all the other clusters  have full freedom in the manner in which they
1086    reorder blocks or functions.
1087    
1088    On the x86 the typical linkage code that is generated is:
1089       ----------------------
1090            .align 2
1091       L0:
1092            addl    $L1-L0, 72(%esp)
1093            jmp     L1
1094    
1095    
1096            .align  2
1097       L1:
1098       ----------------------
1099    
1100    72(%esp) is the memory location for the stdlink register. This
1101    must contain the address of the CPS function being called. In the
1102    above example, it contains the address of  L0; before
1103    calling L1 (the real entry point for the compilation unit), it
1104    must contain the address for L1, and hence
1105    
1106            addl $L1-L0, 72(%esp)
1107    
1108    I have tested this on all architectures except the hppa.The increase
1109    in code size is of course negligible
1110    
1111    ----------------------------------------------------------------------
1112    Name: Allen Leung
1113    Date: 2002/03/03 13:20:00 EST
1114    Tag: leunga-20020303-mlrisc-tools
1115    
1116      Added #[ ... ] expressions to mlrisc tools
1117    
1118    ----------------------------------------------------------------------
1119    Name: Matthias Blume
1120    Date: 2002/02/27 12:29:00 EST
1121    Tag: blume-20020227-cdebug
1122    Description:
1123    
1124    - made types in structure C and C_Debug to be equal
1125    - got rid of code duplication (c-int.sml vs. c-int-debug.sml)
1126    - there no longer is a C_Int_Debug (C_Debug is directly derived from C)
1127    
1128    ----------------------------------------------------------------------
1129    Name: Matthias Blume
1130    Date: 2002/02/26 12:00:00 EST
1131    Tag: blume-20020226-ffi
1132    Description:
1133    
1134    1. Fixed a minor bug in CM's "noweb" tool:
1135       If numbering is turned off, then truly don't number (i.e., do not
1136       supply the -L option to noweb).  The previous behavior was to supply
1137       -L'' -- which caused noweb to use the "default" line numbering scheme.
1138       Thanks to Chris Richards for pointing this out (and supplying the fix).
1139    
1140    2. Once again, I reworked some aspects of the FFI:
1141    
1142       A. The incomplete/complete type business:
1143    
1144       - Signatures POINTER_TO_INCOMPLETE_TYPE and accompanying functors are
1145         gone!
1146       - ML types representing an incomplete type are now *equal* to
1147         ML types representing their corresponding complete types (just like
1148         in C).  This is still safe because ml-nlffigen will not generate
1149         RTTI for incomplete types, nor will it generate functions that
1150         require access to such RTTI.   But when ML code generated from both
1151         incomplete and complete versions of the C type meet, the ML types
1152         are trivially interoperable.
1153    
1154         NOTE:  These changes restore the full generality of the translation
1155         (which was previously lost when I eliminated functorization)!
1156    
1157       B. Enum types:
1158    
1159       - Structure C now has a type constructor "enum" that is similar to
1160         how the "su" constructor works.  However, "enum" is not a phantom
1161         type because each "T enum" has values (and is isomorphic to
1162         MLRep.Signed.int).
1163       - There are generic access operations for enum objects (using
1164         MLRep.Signed.int).
1165       - ml-nlffigen will generate a structure E_foo for each "enum foo".
1166         * The structure contains the definition of type "mlrep" (the ML-side
1167         representation type of the enum).  Normally, mlrep is the same
1168         as "MLRep.Signed.int", but if ml-nlffigen was invoked with "-ec",
1169         then mlrep will be defined as a datatype -- thus facilitating
1170         pattern matching on mlrep values.
1171         ("-ec" will be suppressed if there are duplicate values in an
1172          enumeration.)
1173         * Constructors ("-ec") or values (no "-ec") e_xxx of type mlrep
1174         will be generated for each C enum constant xxx.
1175         * Conversion functions m2i and i2m convert between mlrep and
1176         MLRep.Signed.int.  (Without "-ec", these functions are identities.)
1177         * Coversion functions c and ml convert between mlrep and "tag enum".
1178         * Access functions (get/set) fetch and store mlrep values.
1179       - By default (unless ml-nlffigen was invoked with "-nocollect"), unnamed
1180         enumerations are merged into one single enumeration represented by
1181         structure E_'.
1182    
1183    ----------------------------------------------------------------------
1184    Name: Allen Leung
1185    Date: 2002/02/25 04:45:00 EST
1186    Tag: leunga-20020225-cps-spill
1187    
1188    This is a new implementation of the CPS spill phase.
1189    The new phase is in the new file compiler/CodeGen/cpscompile/spill-new.sml
1190    In case of problems, replace it with the old file spill.sml
1191    
1192    The current compiler runs into some serious performance problems when
1193    constructing a large record.  This can happen when we try to compile a
1194    structure with many items.  Even a very simple structure like the following
1195    makes the compiler slow down.
1196    
1197        structure Foo = struct
1198           val x_1 = 0w1 : Word32.int
1199           val x_2 = 0w2 : Word32.int
1200           val x_3 = 0w3 : Word32.int
1201           ...
1202           val x_N = 0wN : Word32.int
1203        end
1204    
1205    The following table shows the compile time, from N=1000 to N=4000,
1206    with the old compiler:
1207    
1208    N
1209    1000   CPS 100 spill                           0.04u  0.00s  0.00g
1210           MLRISC ra                               0.06u  0.00s  0.05g
1211              (spills = 0 reloads = 0)
1212           TOTAL                                   0.63u  0.07s  0.21g
1213    
1214    1100   CPS 100 spill                           8.25u  0.32s  0.64g
1215           MLRISC ra                               5.68u  0.59s  3.93g
1216              (spills = 0 reloads = 0)
1217           TOTAL                                   14.71u  0.99s  4.81g
1218    
1219    1500   CPS 100 spill                           58.55u  2.34s  1.74g
1220           MLRISC ra                               5.54u  0.65s  3.91g
1221              (spills = 543 reloads = 1082)
1222           TOTAL                                   65.40u  3.13s  6.00g
1223    
1224    2000   CPS 100 spill                           126.69u  4.84s  3.08g
1225           MLRISC ra                               0.80u  0.10s  0.55g
1226              (spills = 42 reloads = 84)
1227           TOTAL                                   129.42u  5.10s  4.13g
1228    
1229    3000   CPS 100 spill                           675.59u  19.03s  11.64g
1230           MLRISC ra                               2.69u  0.27s  1.38g
1231              (spills = 62 reloads = 124)
1232           TOTAL                                   682.48u  19.61s  13.99g
1233    
1234    4000   CPS 100 spill                           2362.82u  56.28s  43.60g
1235           MLRISC ra                               4.96u  0.27s  2.72g
1236              (spills = 85 reloads = 170)
1237           TOTAL                                   2375.26u  57.21s  48.00g
1238    
1239    As you can see the old cps spill module suffers from some serious
1240    performance problem.  But since I cannot decipher the old code fully,
1241    instead of patching the problems up, I'm reimplementing it
1242    with a different algorithm.  The new code is more modular,
1243    smaller when compiled, and substantially faster
1244    (O(n log n) time and O(n) space).  Timing of the new spill module:
1245    
1246    4000  CPS 100 spill                           0.02u  0.00s  0.00g
1247          MLRISC ra                               0.25u  0.02s  0.15g
1248             (spills=1 reloads=3)
1249          TOTAL                                   7.74u  0.34s  1.62g
1250    
1251    Implementation details:
1252    
1253    As far as I can tell, the purpose of the CPS spill module is to make sure the
1254    number of live variables at any program point (the bandwidth)
1255    does not exceed a certain limit, which is determined by the
1256    size of the spill area.
1257    
1258    When the bandwidth is too large, we decrease the register pressure by
1259    packing live variables into spill records.  How we achieve this is
1260    completely different than what we did in the old code.
1261    
1262    First, there is something about the MLRiscGen code generator
1263    that we should be aware of:
1264    
1265    o MLRiscGen performs code motion!
1266    
1267       In particular, it will move floating point computations and
1268       address computations involving only the heap pointer to
1269       their use sites (if there is only a single use).
1270       What this means is that if we have a CPS record construction
1271       statement
1272    
1273           RECORD(k,vl,w,e)
1274    
1275       we should never count the new record address w as live if w
1276       has only one use (which is often the case).
1277    
1278       We should do something similar to floating point, but the transformation
1279       there is much more complex, so I won't deal with that.
1280    
1281    Secondly, there are now two new cps primops at our disposal:
1282    
1283     1. rawrecord of record_kind option
1284        This pure operator allocates some uninitialized storage from the heap.
1285        There are two forms:
1286    
1287         rawrecord NONE [INT n]  allocates a tagless record of length n
1288         rawrecord (SOME rk) [INT n] allocates a tagged record of length n
1289                                     and initializes the tag.
1290    
1291     2. rawupdate of cty
1292          rawupdate cty (v,i,x)
1293          Assigns to x to the ith component of record v.
1294          The storelist is not updated.
1295    
1296    We use these new primops for both spilling and increment record construction.
1297    
1298     1. Spilling.
1299    
1300        This is implemented with a linear scan algorithm (but generalized
1301        to trees).  The algorithm will create a single spill record at the
1302        beginning of the cps function and use rawupdate to spill to it,
1303        and SELECT or SELp to reload from it.  So both spills and reloads
1304        are fine-grain operations.  In contrast, in the old algorithm
1305        "spills" have to be bundled together in records.
1306    
1307        Ideally, we should sink the spill record construction to where
1308        it is needed.  We can even split the spill record into multiple ones
1309        at the places where they are needed.  But CPS is not a good
1310        representation for global code motion, so I'll keep it simple and
1311        am not attempting this.
1312    
1313     2. Incremental record construction (aka record splitting).
1314    
1315        Long records with many component values which are simulatenously live
1316        (recall that single use record addresses are not considered to
1317         be live) are constructed with rawrecord and rawupdate.
1318        We allocate space on the heap with rawrecord first, then gradually
1319        fill it in with rawupdate.  This is the technique suggested to me
1320        by Matthias.
1321    
1322        Some restrictions on when this is applicable:
1323        1. It is not a VECTOR record.  The code generator currently does not handle
1324           this case. VECTOR record uses double indirection like arrays.
1325        2. All the record component values are defined in the same "basic block"
1326           as the record constructor.  This is to prevent speculative
1327           record construction.
1328    
1329    ----------------------------------------------------------------------
1330    Name: Allen Leung
1331    Date: 2002/02/22 01:02:00 EST
1332    Tag: leunga-20020222-mlrisc-tools
1333    
1334    Minor bug fixes in the parser and rewriter
1335    
1336    ----------------------------------------------------------------------
1337    Name: Allen Leung
1338    Date: 2002/02/21 20:20:00 EST
1339    Tag: leunga-20020221-peephole
1340    
1341    Regenerated the peephole files.  Some contained typos in the specification
1342    and some didn't compile because of pretty printing bugs in the old version
1343    of 'nowhere'.
1344    
1345    ----------------------------------------------------------------------
1346    Name: Allen Leung
1347    Date: 2002/02/19 20:20:00 EST
1348    Tag: leunga-20020219-mlrisc-tools
1349    Description:
1350    
1351       Minor bug fixes to the mlrisc-tools library:
1352    
1353       1.  Fixed up parsing colon suffixed keywords
1354       2.  Added the ability to shut the error messages up
1355       3.  Reimplemented the pretty printer and fixed up/improved
1356           the pretty printing of handle and -> types.
1357       4.  Fixed up generation of literal symbols in the nowhere tool.
1358       5.  Added some SML keywords to to sml.sty
1359    
1360    ----------------------------------------------------------------------
1361    Name: Matthias Blume
1362    Date: 2002/02/19 16:20:00 EST
1363    Tag: blume-20020219-cmffi
1364    Description:
1365    
1366    A wild mix of changes, some minor, some major:
1367    
1368    * All C FFI-related libraries are now anchored under $c:
1369        $/c.cm      --> $c/c.cm
1370        $/c-int.cm  --> $c/internals/c-int.cm
1371        $/memory.cm --> $c/memory/memory.cm
1372    
1373    * "make" tool (in CM) now treats its argument pathname slightly
1374      differently:
1375        1. If the native expansion is an absolute name, then before invoking
1376           the "make" command on it, CM will apply OS.Path.mkRelative
1377           (with relativeTo = OS.FileSys.getDir()) to it.
1378        2. The argument will be passed through to subsequent phases of CM
1379           processing without "going native".  In particular, if the argument
1380           was an anchored path, then "make" will not lose track of that anchor.
1381    
1382    * Compiler backends now "know" their respective C calling conventions
1383      instead of having to be told about it by ml-nlffigen.  This relieves
1384      ml-nlffigen from one of its burdens.
1385    
1386    * The X86Backend has been split into X86CCallBackend and X86StdCallBackend.
1387    
1388    * Export C_DEBUG and C_Debug from $c/c.cm.
1389    
1390    * C type encoding in ml-nlffi-lib has been improved to model the conceptual
1391      subtyping relationship between incomplete pointers and their complete
1392      counterparts.  For this, ('t, 'c) ptr has been changed to 'o ptr --
1393      with the convention of instantiating 'o with ('t, 'c) obj whenever
1394      the pointer target type is complete.  In the incomplete case, 'o
1395      will be instantiated with some "'c iobj" -- a type obtained by
1396      using one of the functors PointerToIncompleteType or PointerToCompleteType.
1397    
1398      Operations that work on both incomplete and complete pointer types are
1399      typed as taking an 'o ptr while operations that require the target to
1400      be known are typed as taking some ('t, 'c) obj ptr.
1401    
1402      voidptr is now a bit "more concrete", namely "type voidptr = void ptr'"
1403      where void is an eqtype without any values.  This makes it possible
1404      to work on voidptr values using functions meant to operate on light
1405      incomplete pointers.
1406    
1407    * As a result of the above, signature POINTER_TO_INCOMPLETE_TYPE has
1408      been vastly simplified.
1409    
1410    ----------------------------------------------------------------------
1411    Name: Matthias Blume
1412    Date: 2002/02/19 10:48:00 EST
1413    Tag: blume-20020219-pqfix
1414    Description:
1415    
1416    Applied Chris Okasaki's bug fix for priority queues.
1417    
1418    ----------------------------------------------------------------------
1419    Name: Matthias Blume
1420    Date: 2002/02/15 17:05:00
1421    Tag: Release_110_39
1422    Description:
1423    
1424    Last-minute retagging is becoming a tradition... :-(
1425    
1426    This is the working release 110.39.
1427    
1428    ----------------------------------------------------------------------
1429    Name: Matthias Blume
1430    Date: 2002/02/15 16:00:00 EST
1431    Tag: Release_110_39-orig
1432    Description:
1433    
1434    Working release 110.39.  New bootfiles.
1435    
1436    (Update: There was a small bug in the installer so it wouldn't work
1437    with all shells.  So I retagged. -Matthias)
1438    
1439    ----------------------------------------------------------------------
1440    Name: Matthias Blume
1441    Date: 2002/02/15 14:17:00 EST
1442    Tag: blume-20020215-showbindings
1443    Description:
1444    
1445    Added EnvRef.listBoundSymbols and CM.State.showBindings.  Especially
1446    the latter can be useful for exploring what bindings are available at
1447    the interactive prompt.  (The first function returns only the list
1448    of symbols that are really bound, the second prints those but also the
1449    ones that CM's autoloading mechanism knows about.)
1450    
1451    ----------------------------------------------------------------------
1452    Name: Matthias Blume
1453    Date: 2002/02/15 12:08:00 EST
1454    Tag: blume-20020215-iptrs
1455    Description:
1456    
1457    Two improvements to ml-nlffigen:
1458    
1459      1. Write files only if they do not exist or if their current contents
1460         do not coincide with what's being written.  (That is, avoid messing
1461         with the time stamps unless absolutely necessary.)
1462    
1463      2. Implement a "repository" mechanism for generated files related
1464         to "incomplete pointer types".   See the README file for details.
1465    
1466    ----------------------------------------------------------------------
1467    Name: Matthias Blume
1468    Date: 2002/02/14 11:50:00 EST
1469    Tag: blume-20020214-quote
1470    Description:
1471    
1472    Added a type 't t_' to tag.sml (in ml-nlffi-lib.cm).  This is required
1473    because of the new and improved tag generation scheme.  (Thanks to Allen
1474    Leung for pointing it out.)
1475    
1476    ----------------------------------------------------------------------
1477    Name: Lal George
1478    Date: 2002/02/14 09:55:27 EST 2002
1479    Tag: george-20020214-isabelle-bug
1480    Description:
1481    
1482    Fixed the MLRISC bug sent by Markus Wenzel regarding the compilation
1483    of Isabelle on the x86.
1484    
1485    From Allen:
1486    -----------
1487     I've found the problem:
1488    
1489         in ra-core.sml, I use the counter "blocked" to keep track of the
1490         true number of elements in the freeze queue.  When the counter goes
1491         to zero, I skip examining the queue.  But I've messed up the
1492         bookkeeping in combine():
1493    
1494             else ();
1495             case !ucol of
1496               PSEUDO => (if !cntv > 0 then
1497                     (if !cntu > 0 then blocked := !blocked - 1 else ();
1498                                        ^^^^^^^^^^^^^^^^^^^^^^^
1499                      moveu := mergeMoveList(!movev, !moveu)
1500                     )
1501                  else ();
1502    
1503         combine() is called to coalesce two nodes u and v.
1504         I think I was thinking that if the move counts of u and v are both
1505         greater than zero then after they are coalesced then one node is
1506         removed from the freeze queue.  Apparently I was thinking that
1507         both u and v are of low degree, but that's clearly not necessarily true.
1508    
1509    
1510    02/12/2002:
1511        Here's the patch.  HOL now compiles.
1512    
1513        I don't know how this impact on performance (compile
1514        time or runtime).  This bug caused the RA (especially on the x86)
1515        to go thru the potential spill phase when there are still nodes on the
1516        freeze queue.
1517    
1518    
1519    
1520    
1521    ----------------------------------------------------------------------
1522    Name: Matthias Blume
1523    Date: 2002/02/13 22:40:00 EST
1524    Tag: blume-20020213-fptr-rtti
1525    Description:
1526    
1527    Fixed a bug in ml-nlffigen that was introduced with one of the previous
1528    updates.
1529    
1530    ----------------------------------------------------------------------
1531    Name: Matthias Blume
1532    Date: 2002/02/13 16:41:00 EST
1533    Tag: blume-20020213-cmlpq
1534    Description:
1535    
1536    Added new priority queue export symbols (which have just been added to
1537    smlnj-lib.cm) to CML's version of smlnj-lib.cm.  (Otherwise CML would
1538    not compile and the installer would choke.)
1539    
1540    ----------------------------------------------------------------------
1541    Name: Matthias Blume
1542    Date: 2002/02/13 16:15:00 EST
1543    Tag: blume-20020213-various
1544    Description:
1545    
1546    1. More tweaks to ml-nlffigen:
1547    
1548       - better internal datastructures (resulting in slight speedup)
1549       - "-match" option requires exact match
1550       - "localized" gensym counters (untagged structs/unions nested within
1551         other structs/unions or within typedefs get a fresh counter; their
1552         tag will be prefixed by a concatenation of their parents' tags)
1553       - bug fixes (related to calculation of transitive closure of types
1554         to be included in the output)
1555    
1556    2. Minor Basis updates:
1557    
1558       - added implementations for List.collate and Option.app
1559    
1560    ----------------------------------------------------------------------
1561    Name: Matthias Blume
1562    Date: 2002/02/11 15:55:00 EST
1563    Tag: blume-20020211-gensym
1564    Description:
1565    
1566    Added a "-gensym" option to command line of ml-nlffigen.  This can be
1567    used to specify a "stem" -- a string that is inserted in all "gensym'd"
1568    names (ML structure names that correspond to unnamed C structs, unions,
1569    and enums), so that separate runs of ml-nlffigen do not clash.
1570    
1571    ----------------------------------------------------------------------
1572    Name: Matthias Blume
1573    Date: 2002/02/11 12:05:00 EST
1574    Tag: blume-20020211-gensml
1575    Description:
1576    
1577    A quick fix for a problem with GenSML (in the pgraph-util library):
1578    Make generation of toplevel "local" optional.  (Strictly speaking,
1579    signature definitions within "local" are not legal SML.)
1580    
1581    Other than that: updates to INSTALL and cm/TODO.
1582    
1583    ----------------------------------------------------------------------
1584    Name: Matthias Blume
1585    Date: 2002/02/08 15:00:00 EST
1586    Tag: blume-20020208-uniquepid
1587    Description:
1588    
1589    0. Version number has been bumped to 110.38.1.  NEW BOOTFILES!!!
1590    
1591    1. The installer (config/install.sh) has gotten smarter:
1592    
1593         - Configuration options are a bit easier to specify now
1594           (in config/targets).
1595         - Bug in recognizing .tar.bz2 files fixed.
1596         - Installer automatically resolves dependencies between
1597           configuration options (e.g., if you ask for eXene, you will
1598           also get cml -- regardless whether you asked for it or not).
1599         - Installer can run in "quieter mode" by setting the environment
1600           variable INSTALL_QUIETLY to "true".  "Quieter" does not mean
1601           "completely silent", though.
1602         - Build HashCons library as part of smlnj-lib.
1603    
1604    2. A new scheme for assigning persistent identifiers to compilation
1605       units (and, by extension, to types etc.) has been put into place.
1606       This fixes a long-standing bug where types and even dynamic values
1607       can get internally confused, thereby compromising type safety
1608       (abstraction) and dynamic correctness.  See
1609    
1610         http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
1611    
1612       for an example of how things could go wrong until now.
1613    
1614       The downside of the new scheme is that pids are not quite as
1615       persistent as they used to be: CM will generate a fresh pid
1616       for every compilation unit that it thinks it sees for the first
1617       time.  That means that if you compile starting from a clean, fresh
1618       source tree at two different times, you end up with different
1619       binaries.
1620    
1621       Cutoff recompilation, however, has not been compromised because
1622       CM keeps pid information in special caches between runs.
1623    
1624    ----------------------------------------------------------------------
1625    Name: Lal George
1626    Date: 2002/02/07 15:34:13 EST 2002
1627    Tag: <none>
1628    Description:
1629    
1630    Compilers that generate assembly code may produce  global labels
1631    whose value is resolved at link time. The various peephole optimization
1632    modules did not take this in account.
1633    
1634    TODO. The Labels.addrOf function should really return an option
1635    type so that clients are forced to deal with this issue, rather
1636    than an exception being raised.
1637    
1638    ----------------------------------------------------------------------
1639    Name: Lal George
1640    Date: 2002/02/06 13:55:02 EST
1641    Tag: george-20020206-ra-breakup
1642    Description:
1643    
1644    1. A bug fix from Allen.
1645    
1646        A typo causes extra fstp %st(0)'s to be generated at compensation
1647        edges, which might cause stack underflow traps at runtime.  This
1648        occurs in fft where there are extraneous fstps right before the 'into'
1649        trap instruction (in this case they are harmless since none of the
1650        integers overflow.)
1651    
1652    2. Pulled out various utility modules that were embedded in the modules
1653       of the register allocator. I need these modules for other purposes, but
1654       they are not complete enough to put into a library (just yet).
1655    ----------------------------------------------------------------------
1656    Name: Matthias Blume
1657    Date: 2002/01/31 16:05:00 EST
1658    Tag: blume-20020131-sparc-ccalls
1659    Description:
1660    
1661    1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
1662       of extra stack space by mistake.  Fixed.
1663    
1664    2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
1665    
1666    ----------------------------------------------------------------------
1667    Name: Allen Leung
1668    Date: 2002/01/30
1669    Tag: leunga-20020130-nowhere-bug-fix
1670    Description:
1671    
1672       MLRISC bug fixes:
1673       1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
1674       2. MachineInt.fromString was negating its value.
1675    
1676    ----------------------------------------------------------------------
1677    Name: Matthias Blume
1678    Date: 2002/01/29
1679    Tag: blume-20020129-INSTALL
1680    Description:
1681    
1682    - Added somewhat detailed installation instructions (file INSTALL).
1683    - Fixed curl-detection bug in config/install.sh.
1684    - It is now possible to select the URL getter using the URLGETTER
1685      environment variable:
1686    
1687          not set / "unknown"      --> automatic detection (script tries wget,
1688                                       curl, and lynx)
1689          "wget" / "curl" / "lynx" --> use the specified program (script "knows"
1690                                       how to properly invoke them)
1691          other                    --> use $URLGETTER directly, it must take
1692                                       precisely two command-line arguments
1693                                       (source URL and destination file name)
1694    
1695    ----------------------------------------------------------------------
1696    Name: Matthias Blume
1697    Date: 2002/01/28
1698    Tag: blume-20020128-sparc-ccalls
1699    Description:
1700    
1701    - Fixed problem with calculation of "used" registers in sparc-c-calls.
1702    - Make use of the allocParam argument in sparc-c-calls.
1703    
1704    ----------------------------------------------------------------------
1705    Name: Matthias Blume
1706    Date: 2002/01/28
1707    Tag: blume-20020128-allocParam
1708    Description:
1709    
1710    John Reppy:  Changes c-calls API to accept client-callback for
1711    allocating extra stack space.
1712    me: Corresponding changes to mlriscGen (using a dummy argument that
1713        does not change the current behavior).
1714    
1715    ----------------------------------------------------------------------
1716    Name: Matthias Blume
1717    Date: 2002/01/28 12:00:00
1718    Tag: Release_110_38
1719    Description:
1720    
1721    This time for real!!!
1722    
1723    ----------------------------------------------------------------------
1724    Name: Matthias Blume
1725    Date: 2002/01/28 10:56:00 EST
1726    Tag: blume-20020128-retraction
1727    Description:
1728    
1729    0. Retracted earlier 110.38.  (The Release_110_38 tag has been replaced
1730       with blume-Release_110_38-retracted.)
1731    
1732    1. Fixed a problem with incorrect rounding modes in real64.sml.
1733       (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
1734    
1735    2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
1736       and enums fixed.  The naming of corresponding ML identifiers should
1737       now be consistent again.
1738    
1739    ----------------------------------------------------------------------
1740    Name: Allen Leung
1741    Date: 2002/01/27
1742    Tag: leunga-20020127-nowhere
1743    Description:
1744    
1745       Added a target called nowhere in the configuration scripts.
1746       Enabling this will build the MLRISC 'nowhere' tool (for translating
1747       programs with where-clauses into legal SML code) during installation.
1748    
1749    ----------------------------------------------------------------------
1750    Name: Matthias Blume
1751    Date: 2002/01/25 21:27:00 EST
1752    Tag: blume-Release_110_38-retracted
1753    Description:
1754    
1755    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
1756    
1757    README will be added later.
1758    
1759    !!! NOTE:  Re-tagged as blume-Release_110_38-retracted. Original tag
1760    (Release_110_38) removed.  Reason: Last-minute bug fixes.
1761    
1762    ----------------------------------------------------------------------
1763    Name: Matthias Blume
1764    Date: 2002/01/25
1765    Tag: blume-20020125-ffi
1766    Description:
1767    
1768    A large number of tweaks and improvements to ml-nlffi-lib and
1769    ml-nlffigen:
1770    
1771       - ML represenation types have been streamlined
1772       - getter and setter functions work with concrete values, not abstract
1773         ones where possible
1774       - ml-nlffigen command line more flexible (see README file there)
1775       - some bugs have been fixed (hopefully)
1776    
1777    ----------------------------------------------------------------------
1778    Name: Lal George
1779    Date: 2002/01/24
1780    Tag: george-20020124-risc-ra-interface
1781    Description:
1782    
1783       There is a dramatic simplification in the interface to the
1784       register allocator for RISC architectures as a result of making
1785       parallel copy instructions explicit.
1786    
1787    ----------------------------------------------------------------------
1788    Name: Matthias Blume
1789    Date: 2002/01/22
1790    Tag: blume-20020122-x86-ccalls
1791    Description:
1792    
1793    Bug fix for c-calls on x86 (having to do with how char- and
1794    short-arguments are being handled).
1795    
1796    ----------------------------------------------------------------------
1797    Name: Matthias Blume
1798    Date: 2002/01/21
1799    Tag: blume-20020121-ff
1800    Description:
1801    
1802    Another day of fiddling with the FFI...
1803    
1804    1. Bug fix/workaround:  CKIT does not complain about negative array
1805       dimensions, so ml-nlffigen has to guard itself against this possibility.
1806       (Otherwise a negative dimension would send it into an infinite loop.)
1807    
1808    2. Some of the abstract types (light objects, light pointers, most "base"
1809       types) in structure C are now eqtypes.
1810    
1811    3. Added constructors and test functions for NULL function pointers.
1812    
1813    ----------------------------------------------------------------------
1814    Name: Matthias Blume
1815    Date: 2002/01/18
1816    Tag: blume-20020118-ready-for-new-release
1817    Description:
1818    
1819    Made config/srcarchiveurl point to a new place.  (Will provide boot
1820    files shortly.)
1821    
1822    Maybe we christen this to be 110.38?
1823    
1824    ----------------------------------------------------------------------
1825    Name: Matthias Blume
1826    Date: 2002/01/18
1827    Tag: blume-20020118-more-ffifiddle
1828    Description:
1829    
1830    Today's FFI fiddling:
1831    
1832      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
1833        C.Set.* that use concrete (MLRep.*) arguments and results instead
1834        of abstract ones.
1835    
1836      - Provided word-style bit operations etc. for "int" representation
1837        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
1838        and Long.
1839    
1840    ----------------------------------------------------------------------
1841    Name: Matthias Blume
1842    Date: 2002/01/18
1843    Tag: blume-20020118-use-x86-fp
1844    Description:
1845    
1846    Now that x86-fast-fp seems to be working, I turned it back on again
1847    by default.  (Seems to work fine now, even with the FFI.)
1848    
1849    Other than that, I added some documentation about the FFI to
1850    src/ml-nlffigen/README and updated the FFI test examples in
1851    src/ml-nlffi-lib/Tests/*.
1852    
1853    ----------------------------------------------------------------------
1854    Name: Allen Leung
1855    Date: 2002/01/17
1856    Tag: leunga-20020117-x86-fast-fp-call
1857    Description:
1858    
1859       1. Fixed a problem with handling return fp values when x86's fast fp
1860          mode is turned on.
1861    
1862       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
1863          of %f32.
1864    
1865       3. Added a constructor INT32lit to the ast of MLRISC tools.
1866    
1867    ----------------------------------------------------------------------
1868    Name: Matthias Blume
1869    Date: 2002/01/16
1870    Tag: blume-20020116-ffifiddle
1871    Description:
1872    
1873    More fiddling with the FFI interface:
1874    
1875     - Make constness 'c instead of rw wherever possible.  This eliminates
1876       the need for certain explicit coercions.  (However, due to ML's
1877       value polymorphism, there will still be many cases where explicit
1878       coercions are necessary.  Phantom types are not the whole answer
1879       to modeling a subtyping relationship in ML.)
1880    
1881     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
1882    
1883     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
1884       clumsy workaround for varargs problem.)
1885    
1886    ----------------------------------------------------------------------
1887    Name: Lal George
1888    Date: 2002/01/15
1889    Tag: <none>
1890    Description:
1891    
1892    1. Since COPY instructions are no longer native to the architecture,
1893       a generic functor can be used to implement the expandCopies function.
1894    
1895    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
1896       TEXT segment.
1897    
1898    ----------------------------------------------------------------------
1899    Name: Matthias Blume
1900    Date: 2002/01/15
1901    Tag: blume-20020115-ffiupdates
1902    Description:
1903    
1904    1. Fix for bug resulting in single-precision float values being returned
1905       incorrectly from FFI calls.
1906    
1907    2. Small modifications to C FFI API:
1908    
1909        - memory-allocation routines return straight objects (no options)
1910          and raise an exception in out-of-memory situations
1911        - unsafe extensions to cast between function pointers and pointers
1912          from/to ints
1913        - added structure C_Debug as an alternative to structure C where
1914          pointer-dereferencing (|*| and |*!) always check for null-pointers
1915        - added open_lib' to DynLinkage;  open_lib' works like open_lib
1916          but also takes a (possibly empty) list of existing library handles
1917          that the current library depends on
1918    
1919    ----------------------------------------------------------------------
1920    Name: Matthias Blume
1921    Date: 2002/01/10
1922    Tag: blume-20020110-newffigen
1923    Description:
1924    
1925    1. Updates to portable graph code.
1926    
1927    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
1928       more scalable now so that even huge interfaces such as the one
1929       for GTK compile in finite time and space. :-)
1930       See src/ml-nlffigen/README for details on what's new.
1931    
1932    ----------------------------------------------------------------------
1933    Name: Lal George
1934    Date: 2001/01/09 14:31:35 EST 2002
1935    Tag: george-20011206-rm-native-copy
1936    Description:
1937    
1938            Removed the native COPY and FCOPY instructions
1939            from all the architectures and replaced it with the
1940            explicit COPY instruction from the previous commit.
1941    
1942            It is now possible to simplify many of the optimizations
1943            modules that manipulate copies. This has not been
1944            done in this change.
1945    
1946    ----------------------------------------------------------------------
1947    Name: Lal George
1948    Date: 2001/12/06 16:50:13 EST 2001
1949    Tag: george-20011206-mlrisc-instruction
1950    Description:
1951    
1952    Changed the representation of instructions from being fully abstract
1953    to being partially concrete. That is to say:
1954    
1955      from
1956            type instruction
1957    
1958      to
1959            type instr                              (* machine instruction *)
1960    
1961            datatype instruction =
1962                LIVE of {regs: C.cellset, spilled: C.cellset}
1963              | KILL of {regs: C.cellset, spilled: C.cellset}
1964              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
1965              | ANNOTATION of {i: instruction, a: Annotations.annotation}
1966              | INSTR of instr
1967    
1968    This makes the handling of certain special instructions that appear on
1969    all architectures easier and uniform.
1970    
1971    LIVE and KILL say that a list of registers are live or killed at the
1972    program point where they appear. No spill code is generated when an
1973    element of the 'regs' field is spilled, but the register is moved to
1974    the 'spilled' (which is present, more for debugging than anything else).
1975    
1976    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
1977    We used to generate:
1978    
1979            DEFFREG f1
1980            f1 := f2 + f3
1981            trapb
1982    
1983    but now generate:
1984    
1985            f1 := f2 + f3
1986            trapb
1987            LIVE {regs=[f1,f2,f3], spilled=[]}
1988    
1989    Furthermore, the DEFFREG (hack) required that all floating point instruction
1990    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
1991    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
1992    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
1993    this architecture).
1994    
1995    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
1996    all the architectures. This will result in further simplification of the
1997    register allocator that must be aware of them for coalescing purposes, and
1998    will also simplify certain aspects of the machine description that provides
1999    callbacks related to parallel copies.
2000    
2001    ANNOTATION should be obvious, and now INSTR represents the honest to God
2002    machine instruction set!
2003    
2004    The <arch>/instructions/<arch>Instr.sml files define certain utility
2005    functions for making porting easier -- essentially converting upper case
2006    to lower case. All machine instructions (of type instr) are in upper case,
2007    and the lower case form generates an MLRISC instruction. For example on
2008    the alpha we have:
2009    
2010      datatype instr =
2011         LDA of {r:cell, b:cell, d:operand}
2012       | ...
2013    
2014      val lda : {r:cell, b:cell, d:operand} -> instruction
2015        ...
2016    
2017    where lda is just (INSTR o LDA), etc.
2018    
2019    ----------------------------------------------------------------------
2020    Name: Matthias Blume
2021    Date: 2001/11/22 21:40:00 EST
2022    Tag: Release_110_37
2023    Description:
2024    
2025    Release 110.37.  This time for real.
2026    
2027    ----------------------------------------------------------------------
2028    Name: Matthias Blume
2029    Date: 2001/11/21 16:35:00 EST
2030    Tag: blume-20011121-foot-in-mouth
2031    Description:
2032    
2033    Removed the "Release_110_37" tag because of a serious bug.
2034    This will be re-tagged once the bug is fixed.
2035    
2036    ----------------------------------------------------------------------
2037    Name: Matthias Blume
2038    Date: 2001/11/21 16:14:00 EST
2039    Tag: blume-20011121-forgottenfile
2040    Description:
2041    
2042    Forgot to add a file.  (Just a .tex-file -- part of
2043    the CM manual source.)
2044    
2045    ----------------------------------------------------------------------
2046    Name: Matthias Blume
2047    Date: 2001/11/21 16:10:00 EST
2048    Tag: blume-20011121-invalid_110_37
2049    Description:
2050    
2051    Note: I removed the original tag "Release_110_37" from this commit
2052          because we found a serious bug in all non-x86 backends.
2053          - Matthias
2054    
2055    1. Modifications to the SML/NJ code generator and to the runtime system
2056       so that code object name strings are directly inserted into code
2057       objects at code generation time.  The only business the runtime system
2058       has with this is now to read the name strings on occasions.
2059       (The encoding of the name string has also changed somewhat.)
2060    
2061    2. CM now implements a simple "set calculus" for specifying export lists.
2062       In particular, it is now possible to refer to the export lists of
2063       other libraries/groups/sources and form unions as well as differences.
2064       See the latest CM manual for details.
2065    
2066    3. An separate notion of "proxy" libraries has again be eliminated from
2067       CM's model.  (Proxy libraries are now simply a special case of using
2068       the export list calculus.)
2069    
2070    4. Some of the existing libraries now take advantage of the new set
2071       calculus.
2072       (Notice that not all libraries have been converted because some
2073       of the existing .cm-files are supposed to be backward compatible
2074       with 110.0.x.)
2075    
2076    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
2077       "General.exnMessage"!  The former relies on a certain hook to be
2078       initialized, and that often does not happen in the stand-alone case.)
2079    
2080    ----------------------------------------------------------------------
2081    Name: Lal George
2082    Date: 2001/11/21  13:56:18 EST
2083    Tag: george-2001121-pseudo-ops
2084    Description:
2085    
2086      Implemented a complete redesign of MLRISC pseudo-ops. Now there
2087      ought to never be any question of incompatabilities with
2088      pseudo-op syntax expected by host assemblers.
2089    
2090      For now, only modules supporting GAS syntax are implemented
2091      but more should follow, such as MASM, and vendor assembler
2092      syntax, e.g. IBM as, Sun as, etc.
2093    
2094    ----------------------------------------------------------------------
2095    Name: Matthias Blume
2096    Date: 2001/11/14 11:52:00 EST
2097    Tag: blume-20011114-srcname
2098    Description:
2099    
2100    1. Routed the name of the current source file to mlriscgen where it
2101       should be directly emitted into the code object.  (This last part
2102       is yet to be done.)
2103    
2104    2. Some cleanup of the pgraph code to make it match the proposal that
2105       I put out the other day.  (The proposal notwithstanding, things are
2106       still in flux here.)
2107    
2108    ----------------------------------------------------------------------
2109    Name: Lal George
2110    Date: 2001/11/14 09:44:04 EST
2111    Tag:
2112    Description:
2113    
2114      Fix for a backpatching bug reported by Allen.
2115    
2116      Because the boundary between short and long span-dependent
2117      instructions is +/- 128, there are an astounding number of
2118      span-dependent instructions whose size is over estimated.
2119    
2120      Allen came up with the idea of letting the size of span
2121      dependent instructions be non-monotonic, for a maxIter
2122      number of times, after which the size must be monotonically
2123      increasing.
2124    
2125      This table shows the number of span-dependent instructions
2126      whose size was over-estimated as a function of maxIter, for the
2127      file Parse/parse/ml.grm.sml:
2128    
2129         maxIter            # of instructions:
2130            10                      687
2131            20                      438
2132            30                      198
2133            40                        0
2134    
2135      In compiling the compiler, there is no significant difference in
2136      compilation speed between maxIter=10 and maxIter=40. Actually,
2137      my measurements showed that maxIter=40 was a tad faster than
2138      maxIter=10! Also 96% of the  files in the compiler reach a fix
2139      point within 13 iterations, so fixing maxIter at 40, while high,
2140      is okay.
2141    
2142    ----------------------------------------------------------------------
2143    Name: Matthias Blume
2144    Date: 2001/10/31 15:25:00 EST
2145    Tag: blume-20011031-pgraph
2146    Description:
2147    
2148    CKIT:
2149    * Changed the "Function" constructor of type Ast.ctype to carry optional
2150      argument identifiers.
2151    * Changed the return type of TypeUtil.getFunction accordingly.
2152    * Type equality ignores the argument names.
2153    * TypeUtil.composite tries to preserve argument names but gives up quickly
2154      if there is a mismatch.
2155    
2156    installation script:
2157    * attempts to use "curl" if available (unless "wget" is available as well)
2158    
2159    CM:
2160    * has an experimental implementation of "portable graphs" which I will
2161      soon propose as an implementation-independent library format
2162    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
2163    
2164    NLFFI-LIB:
2165    * some cleanup (all cosmetic)
2166    
2167    NLFFIGEN:
2168    * temporarily disabled the mechanism that suppresses ML output for
2169      C definitions whose identifiers start with an underscore character
2170    * generate val bindings for enum constants
2171    * user can request that only one style (light or heavy) is being used;
2172      default is to use both (command-line arguments: -heavy and -light)
2173    * fixed bug in handling of function types involving incomplete pointers
2174    * generate ML entry points that take record arguments (i.e., using
2175      named arguments) for C functions that have a prototype with named
2176      arguments
2177      (see changes to CKIT)
2178    
2179    ----------------------------------------------------------------------
2180    Name: Allen Leung
2181    Date: 2001/10/27 20:34:00 EDT
2182    Tag: leunga-20011027-x86-fast-fp-call
2183    Description:
2184    
2185       Fixed the bug described in blume-20010920-slowfp.
2186    
2187       The fix involves
2188          1. generating FCOPYs in FSTP in ia32-svid
2189          2. marking a CALL with the appropriate annotation
2190    
2191    ----------------------------------------------------------------------
2192    Name: Matthias Blume
2193    Date: 2001/10/16 11:32:00 EDT
2194    Tag: blume-20011016-netbsd
2195    Description:
2196    
2197    Underscore patch from Chris Richards (fixing problem with compiling
2198    runtime system under recent NetBSD).
2199    
2200    ----------------------------------------------------------------------
2201    Name: Allen Leung
2202    Date: 2001/10/12 17:18:32 EDT 2001
2203    Tag: leung-20011012-x86-printflowgraph
2204    Description:
2205    
2206    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
2207    
2208    ----------------------------------------------------------------------
2209    Name: Lal George
2210    Date: 2001/10/11 23:51:34 EDT
2211    Tag: george-20011011-too-many-instrs
2212    Description:
2213    
2214    The representation of a program point never expected to see more
2215    than 65536 instructions in a basic block!
2216    
2217    ----------------------------------------------------------------------
2218    Name: Lal George
2219    Date: 2001/10/09 09:41:37 EDT
2220    Tag: george-20011008-mlrisc-labels
2221    Description:
2222    
2223    Changed the machine description files to support printing of
2224    local and global labels in assembly code, based on host assembler
2225    conventions.
2226    
2227    ----------------------------------------------------------------------
2228    Name: Matthias Blume
2229    Date: 2001/09/25 15:25:00 EDT
2230    Tag: blume-20010925-exninfo
2231    Description:
2232    
2233    I provided a non-hook implementation of exnName (at the toplevel) and
2234    made the "dummy" implementation of exnMessage (at the toplevel) more
2235    useful: if nothing gets "hooked in", then at least you are going to
2236    see the exception name and a message indicating why you don't see more.
2237    
2238    [For the time being, programs that need exnMessage and want to use
2239    ml-build should either use General.exnMessage (strongly recommended) or
2240    refer to structure General at some other point so that CM sees a
2241    static dependency.]
2242    
2243    [Similar remarks go for "print" and "use":  If you want to use their
2244    functionality in stand-alone programs generated by ml-build, then use
2245    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
2246    
2247    ----------------------------------------------------------------------
2248    Name: Matthias Blume
2249    Date: 2001/09/20 17:28:00 EDT
2250    Tag: blume-20010920-slowfp
2251    Description:
2252    
2253    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
2254    
2255    ----------------------------------------------------------------------
2256    Name: Matthias Blume
2257    Date: 2001/09/20 17:20:00 EDT
2258    Tag: blume-20010920-canonicalpaths
2259    Description:
2260    
2261    0. Updated the BOOT file (something that I forgot to do earlier).
2262    
2263    1. Small internal change to CM so that it avoids "/../" in filenames
2264       as much as possible (but only where it is safe).
2265    
2266    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
2267       that arguments that contain delimiters are passed through correctly.
2268       This change also means that all "special" arguments of the form
2269       @SMLxxx... must come first.
2270    
2271    3. Changed install script to put relative anchor names for tool commands
2272       into pathconfig.
2273    
2274    ----------------------------------------------------------------------
2275    Name: Matthias Blume
2276    Date: 2001/09/18 15:35:00 EDT
2277    Tag: blume-20010918-readme11036
2278    Description:
2279    
2280    Added README files.
2281    
2282    ----------------------------------------------------------------------
2283    Name: Matthias Blume
2284    Date: 2001/09/18 11:45:00 EDT
2285    Tag: Release_110_36 (retag)
2286    Description:
2287    
2288    Fixed mistake in config/preloads. Retagged as 110.36.
2289    
2290    ----------------------------------------------------------------------
2291    Name: Matthias Blume
2292    Date: 2001/09/18 09:40:00 EDT
2293    Tag: Release_110_36_orig (tag changed)
2294    Description:
2295    
2296    New version (110.36).  New bootfiles.
2297    
2298    ----------------------------------------------------------------------
2299    Name: Matthias Blume
2300    Date: 2001/09/14 16:15:00 EDT
2301    Tag: blume-20010914-x86fastfp
2302    Description:
2303    
2304    John committed some changes that Allen made, in particular a (hopefully)
2305    correctly working version of the x86-fp module.
2306    
2307    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
2308    flag to "true".  Everything seems to compile to a fixpoint ok, and
2309    "mandelbrot" speeds up by about 15%.
2310    
2311    ----------------------------------------------------------------------
2312    Name: Matthias Blume
2313    Date: 2001/09/13 11:20:00 EDT
2314    Tag: blume-20010913-minimal
2315    Description:
2316    
2317    1. Stefan Monnier's patch to fix a miscompilation problem that
2318       was brought to light by John Reppy's work on Moby.
2319    
2320    2. Implemented a minimal "structure Compiler" that contains just
2321       "version" and "architecture".  The minimal version will be
2322       available when the full version is not.  This is for backward-
2323       compatibility with code that wants to test Compiler.version.
2324    
2325    ----------------------------------------------------------------------
2326    Name: Matthias Blume
2327    Date: 2001/08/28 14:03:00 EDT
2328    Tag: blume-20010828-ml-lex
2329    Description:
2330    
2331    Fix for bug 1581, received from Neophytos Michael.
2332    
2333    ----------------------------------------------------------------------
2334    Name: Matthias Blume
2335    Date: 2001/08/27 11:20:00 EDT
2336    Tag: blume-20010827-readme11035
2337    Description:
2338    
2339    Fleshed out the README file for 110.35.
2340    
2341    ----------------------------------------------------------------------
2342    Name: Matthias Blume
2343    Date: 2001/08/24 17:10:00 EDT
2344    Tag: Release_110_35
2345    Description:
2346    
2347    New version number (110.35).  New bootfiles.
2348    
2349    ----------------------------------------------------------------------
2350    Name: Lal George
2351    Date: 2001/08/24 13:47:18 EDT 2001
2352    Tag: george-20010824-MLRISC-graphs
2353    Description:
2354    
2355     removed clusters from MLRISC completely and replaced with graphs.
2356    
2357    ----------------------------------------------------------------------
2358    Name: Matthias Blume
2359    Date: 2001/08/23 17:50:00 EDT
2360    Tag: blume-20010823-toplevel
2361    Description:
2362    
2363    - some reorganization of the code that implements various kinds of
2364      environments in the compiler (static, dynamic, symbolic, combined)
2365    - re-implemented the EnvRef module so that evalStream works properly
2366      (if the stream contains references to "use", "CM.make", etc.)
2367    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
2368    
2369    ----------------------------------------------------------------------
2370    Name: Matthias Blume
2371    Date: 2001/08/20 15:50 EDT
2372    Tag: blume20010820-slipup
2373    Description:
2374    
2375    I forgot to commit a few files.  Here they are...
2376    
2377    ----------------------------------------------------------------------
2378    Name: Matthias Blume
2379    Date: 2001/08/20 15:35:00 EDT
2380    Tag: blume-20010820-debugprof
2381    Description:
2382    
2383    !!!! NEW BOOTFILES !!!!
2384    
2385    This is another round of reorganizing the compiler sources.  This
2386    time the main goal was to factor out all the "instrumentation"
2387    passes (for profiling and backtracing) into their own library.
2388    The difficulty was to do it in such a way that it does not depend
2389    on elaborate.cm but only on elabdata.cm.
2390    
2391    Therefore there have been further changes to both elaborate.cm and
2392    elabdata.cm -- more "generic" things have been moved from the former
2393    to the latter.  As a result, I was forced to split the assignment
2394    of numbers indicating "primtyc"s into two portions: SML-generic and
2395    SML/NJ-specific.  Since it would have been awkward to maintain,
2396    I bit the bullet and actually _changed_ the mapping between these
2397    numbers and primtycs.  The bottom line of this is that you need
2398    a new set of bin- and bootfiles.
2399    
2400    I have built new bootfiles for all architectures, so doing a fresh
2401    checkout and config/install.sh should be all you need.
2402    
2403    The newly created library's name is
2404    
2405        $smlnj/viscomp/debugprof.cm
2406    
2407    and its sources live under
2408    
2409        src/compiler/DebugProf
2410    
2411    ----------------------------------------------------------------------
2412    Name: Matthias Blume
2413    Date: 2001/08/15 17:15:00 EDT
2414    Tag: blume-20010815-compreorg
2415    Description:
2416    
2417    This is a first cut at reorganizing the CM libraries that make up the
2418    core of the compiler.  The idea is to separate out pieces that could
2419    be used independently by tools, e.g., the parser, the typechecker, etc.
2420    
2421    The current status is a step in this direction, but it is not quite
2422    satisfactory yet.  Expect more changes in the future.
2423    
2424    Here is the current (new) organization...
2425    
2426        What used to be $smlnj/viscomp/core.cm is now divided into
2427        six CM libraries:
2428    
2429             $smlnj/viscomp/basics.cm
2430                           /parser.cm
2431                           /elabdata.cm
2432                           /elaborate.cm
2433                           /execute.cm
2434                           /core.cm
2435    
2436        The CM files for these libraries live under src/system/smlnj/viscomp.
2437        All these libraries are proxy libraries that contain precisely
2438        one CM library component.  Here are the locations of the components
2439        (all within the src/compiler tree):
2440    
2441             Basics/basics.cm
2442             Parse/parser.cm
2443             ElabData/elabdata.cm
2444             Elaborator/elaborate.cm
2445             Execution/execute.cm
2446             core.cm
2447    
2448         [This organization is the same that has been used already
2449         for a while for the architecture-specific parts of the visible
2450         compiler and for the old version of core.cm.]
2451    
2452         As you will notice, many source files have been moved from their
2453         respective original locations to a new home in one of the above
2454         subtrees.
2455    
2456         The division of labor between the new libraries is the following:
2457    
2458             basics.cm:
2459                - Simple, basic definitions that pertain to many (or all) of
2460                  the other libraries.
2461             parser.cm:
2462                - The SML parser, producing output of type Ast.dec.
2463                - The type family for Ast is also defined and exported here.
2464             elabdata.cm:
2465                - The datatypes that describe input and output of the elaborator.
2466                  This includes types, absyn, and static environments.
2467             elaborator.cm:
2468                - The SML/NJ type checker and elaborator.
2469                  This maps an Ast.dec (with a given static environment) to
2470                  an Absyn.dec (with a new static environment).
2471                - This libraries implements certain modules that used to be
2472                  structures as functors (to remove dependencies on FLINT).
2473             execute.cm:
2474                - Everything having to do with executing binary code objects.
2475                - Dynamic environments.
2476             core.cm:
2477                - SML/NJ-specific instantiations of the elaborator and MLRISC.
2478                - Top-level modules.
2479                - FLINT (this should eventually become its own library)
2480    
2481    Notes:
2482    
2483    I am not 100% happy with the way I separated the elaborator (and its
2484    data structures) from FLINT.  Two instances of the same problem:
2485    
2486        1. Data structures contain certain fields that carry FLINT-specific
2487           information.  I hacked around this using exn and the property list
2488           module from smlnj-lib.  But the fact that there are middle-end
2489           specific fields around at all is a bit annoying.
2490    
2491        2. The elaborator calculates certain FLINT-related information.  I tried
2492           to make this as abstract as I could using functorization, but, again,
2493           the fact that the elaborator has to perform calculations on behalf
2494           of the middle-end at all is not nice.
2495    
2496        3. Having to used exn and property lists is unfortunate because it
2497           weakens type checking.  The other alternative (parameterizing
2498           nearly *everything*) is not appealing, though.
2499    
2500    I removed the "rebinding =" warning hack because due to the new organization
2501    it was awkward to maintain it.  As a result, the compiler now issues some of
2502    these warnings when compiling init.cmi during bootstrap compilation. On
2503    the plus side, you also get a warning when you do, for example:
2504       val op = = Int32.+
2505    which was not the case up to now.
2506    
2507    I placed "assign" and "deref" into the _Core structure so that the
2508    code that deals with the "lazy" keyword can find them there.  This
2509    removes the need for having access to the primitive environment
2510    during elaboration.
2511    
2512    ----------------------------------------------------------------------
2513    Name: Matthias Blume
2514    Date: 2001/08/13
2515    Tag: blume-20010813-closures
2516    Description:
2517    
2518    This fix was sent to us by Zhong Shao.  It is supposed to improve the
2519    performance of certain loops by avoiding needless closure allocation.
2520    
2521    ----------------------------------------------------------------------
2522    Name: Lal George
2523    Date: 2001/07/31 10:03:23 EDT 2001
2524    Tag: george-20010731-x86-fmalloc
2525    Description: Fixed bug in x86 calls
2526    
2527        There was a bug where call instructions would mysteriously
2528        vanish. The call instruction had to be one that returned
2529        a floating point value.
2530    
2531    ----------------------------------------------------------------------
2532    Name: Lal George
2533    Date: 2001/07/19 16:36:29 EDT 2001
2534    Tag: george-20010719-simple-cells
2535    Description:
2536    
2537    I have dramatically simplified the interface for CELLS in MLRISC.
2538    
2539    In summary, the cells interface is broken up into three parts:
2540    
2541      1. CellsBasis : CELLS_BASIS
2542    
2543            CellsBasis is a top level structure and common for all
2544            architectures.  it contains the definitions of basic datatypes
2545            and utility  functions over these types.
2546    
2547      2. functor Cells() : CELLS
2548    
2549            Cells generates an interface for CELLS that incorporates the
2550            specific resources on the target architecture, such as the
2551            presence of special register classes, their number and size,
2552            and various useful substructures.
2553    
2554      3. <ARCH>CELLS
2555    
2556            e.g. SparcCells: SPARCCELLS
2557    
2558            <ARCH>CELLS usually contains additional bindings for special
2559            registers  on the architecture, such as:
2560    
2561                    val r0 : cell           (* register zero *)
2562                    val y : cell            (* Y register *)
2563                    val psr : cell          (* processor status register *)
2564                    ...
2565    
2566            The structure returned by applying the Cells functor is opened
2567            in this interface.
2568    
2569    The main implication of all this is that the datatypes for cells is
2570    split between CellsBasis and CELLS -- a fairly simple change for user
2571    code.
2572    
2573    In the old scheme the CELLS interface had a definitional binding of
2574    the form:
2575    
2576            signature CELLS = sig
2577    
2578               structure CellsBasis = CellsBasis
2579    
2580               ...
2581    
2582            end
2583    
2584    With all the sharing constraints that goes on in MLRISC, this old
2585    design  quickly leads to errors such as:
2586    
2587            "structure definition spec inside of sharing ... "
2588    
2589    
2590    and appears to require an unacceptable amount of sharing and where
2591    constraint hackery.
2592    
2593    I think this error message (the interaction of definitional specs and
2594    sharing) requires more explanation on our web page.
2595    
2596    ----------------------------------------------------------------------
2597    Name: Matthias Blume
2598    Date: 2001/07/19 15:00:00 EDT
2599    Tag: blume-20010719-libreorg
2600    Description:
2601    
2602    This update puts together a fairly extensive but straightforward change
2603    to the way the libraries that implement the interactive system are
2604    organized:
2605    
2606       The biggest change is the elimination of structure Compiler.  As a
2607       replacement for this structure, there is now a CM library
2608       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
2609       that exports all the substructures of the original structure Compiler
2610       directly.  So instead of saying Compiler.Foo.bar one now simply
2611       says Foo.bar.  (The CM libraries actually export a collection of
2612       structures that is richer than the collection of substructures of
2613       structure Compiler.)
2614    
2615       To make the transition smooth, there is a separate library called
2616       $smlnj/compiler/compiler.cm which puts together and exports the
2617       original structure Compiler (or at least something very close to it).
2618    
2619       There are five members of the original structure Compiler
2620       that are not exported directly but which instead became members
2621       of a new structure Backend (described by signature BACKEND).  These are:
2622       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
2623       Interact (: INTERACT), structure Machine (: MACHINE), and val
2624       architecture (: string).
2625    
2626       Structure Compiler.Version has become structure CompilerVersion.
2627    
2628       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
2629       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
2630       or x86, respectively.
2631       Each of these exports the same frontend structures that
2632       $smlnj/compiler.cm exports.  But they do not have a structure Backend
2633       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
2634       Hppa, PPC, Sparc, or X86, respectively.
2635    
2636       Library $smlnj/compiler/all.cm exports the union of the exports of
2637       $smlnj/compiler/<arch>.cm
2638    
2639       There are no structures <Arch>Compiler anymore, use
2640       $smlnj/compiler/<arch>.cm instead.
2641    
2642       Library host-compiler-0.cm is gone.  Instead, the internal library
2643       that instantiates CM is now called cm0.cm.  Selection of the host
2644       compiler (backend) is no longer done here but. (Responsibility for it
2645       now lies with $smlnj/compiler/current.cm.  This seems to be more
2646       logical.)
2647    
2648       Many individual files have been moved or renamed.  Some files have
2649       been split into multiple files, and some "dead" files have been deleted.
2650    
2651    Aside from these changes to library organization, there are also changes
2652    to the way the code itself is organized:
2653    
2654       Structure Binfile has been re-implemented in such a way that it no
2655       longer needs any knowledge of the compiler.  It exclusively deals
2656       with the details of binfile layout.  It no longer invokes the
2657       compiler (for the purpose of creating new prospective binfile
2658       content), and it no longer has any knowledge of how to interpret
2659       pickles.
2660    
2661       Structure Compile (: COMPILE) has been stripped down to the bare
2662       essentials of compilation.  It no longer deals with linking/execution.
2663       The interface has been cleaned up considerably.
2664    
2665       Utility routines for dealing with linking and execution have been
2666       moved into their own substructures.
2667    
2668       (The ultimate goal of these changes is to provide a light-weight
2669       binfile loader/linker (at least for, e.g., stable libraries) that
2670       does not require CM or the compiler to be present.)
2671    
2672    CM documentation has been updated to reflect the changes to library
2673    organization.
2674    
2675    ----------------------------------------------------------------------
2676    Name: Matthias Blume
2677    Date: 2001/07/10 17:30:00 EDT
2678    Tag: Release_110_34
2679    Description:
2680    
2681    Minor tweak to 110.34 (re-tagged):
2682    
2683      - README.html file added to CVS repository
2684      - runtime compiles properly under FreeBSD 3.X and 4.X
2685    
2686    ----------------------------------------------------------------------
2687    Name: Matthias Blume
2688    Date: 2001/07/10 17:30:00 EDT
2689    Tag: Release_110_34
2690    Description:
2691    
2692    New version number (110.34). New bootfiles.
2693    
2694    ----------------------------------------------------------------------
2695    Name: Matthias Blume
2696    Date: 2001/07/09 16:00:00 EDT
2697    Tag: blume-20010709-more-varargs
2698    Description:
2699    
2700    I changed the handling of varargs in ml-nlffigen again:
2701    The ellipsis ... will now simply be ignored (with an accompanying warning).
2702    
2703    The immediate effect is that you can actually call a varargs function
2704    from ML -- but you can't actually supply any arguments beyond the ones
2705    specified explicitly.  (For example, you can call printf with its format
2706    string, but you cannot pass additional arguments.)
2707    
2708    This behavior is only marginally more useful than the one before, but
2709    it has the advantage that a function or, more importantly, a function
2710    type never gets dropped on the floor, thus avoiding follow-up problems with
2711    other types that refer to the offending one.
2712    
2713    ----------------------------------------------------------------------
2714    Name: Matthias Blume
2715    Date: 2001/07/09 11:25:00 EDT
2716    Tag: blume-20010709-varargs
2717    Description:
2718    
2719    1. ckit-lib.cm now exports structure Error
2720    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
2721       with a warning accompanied by a source location.  Moreover, it
2722       merely skips the offending function or type and proceeds with the
2723       rest of its work.u  As a result, one can safely feed C code containing
2724       "..." to ml-nlffigen.
2725    3. There are some internal improvements to CM, providing slightly
2726       more general string substitutions in the tools subsystem.
2727    
2728    ----------------------------------------------------------------------
2729    Name: Matthias Blume
2730    Date: 2001/06/27 15:10:00 EDT
2731    Tag: blume-20010627-concur
2732    Description:
2733    
2734    Fixed a small bug in CM's handling of parallel compilation.
2735    (You could observe the bug by Control-C-interrupting an ordinary
2736    CMB.make or CM.stabilize and then attaching some compile servers.
2737    The result was that all of a sudden the previously interrupted
2738    compilation would continue on its own.  This was because of
2739    an over-optimization: CM did not bother to clean out certain queues
2740    when no servers were attached "anyway", resulting in the contents
2741    of these queues to grab control when new servers did get attached.)
2742    
2743    There is also another minor update to the CM manual.
2744    
2745    ----------------------------------------------------------------------
2746    Name: Matthias Blume
2747    Date: 2001/06/26 16:15:00 EDT
2748    Tag: blume-20010626-cmdoc
2749    Description:
2750    
2751    Minor typo fixed in CM manual (syntax diagram for libraries).
2752    
2753    ----------------------------------------------------------------------
2754    Name: Matthias Blume
2755    Date: 2001/06/25 22:55:00 EDT
2756    Tag: blume-20010625-x86pc
2757    Description:
2758    
2759    Fixed a nasty bug in the X86 assembly code that caused signal
2760    handlers to fail (crash) randomly.
2761    
2762    ----------------------------------------------------------------------
2763    Name: Matthias Blume
2764    Date: 2001/06/25 12:05:00 EDT
2765    Tag: blume-20010625-nlffigen
2766    Description:
2767    
2768    This update fixes a number of minor bugs in ml-nlffigen as reported by
2769    Nick Carter <nbc@andrew.cmu.edu>.
2770    
2771      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
2772      2. Default names for generated files are now derived from the name of
2773         the C file *without its directory*.  In particular, this causes generated
2774         files to be placed locally even if the C file is in some system directory.
2775      3. Default names for generated signatures and structures are also derived
2776         from the C file name without its directory.  This avoids silly things
2777         like "structure GL/GL".
2778         (Other silly names are still possible because ml-nlffigen does not do
2779          a thorough check of whether generated names are legal ML identifiers.
2780          When in doubt, use command line arguments to force particular names.)
2781    
2782    ----------------------------------------------------------------------
2783    Name: Matthias Blume
2784    Date: 2001/06/21 12:25:00 EDT
2785    Tag: blume-20010621-eXene
2786    Description:
2787    
2788    eXene now compiles and (sort of) works again.
2789    
2790    The library name (for version > 110.33) is $/eXene.cm.
2791    
2792    I also added an new example in src/eXene/examples/nbody.  See the
2793    README file there for details.
2794    
2795    ----------------------------------------------------------------------
2796    Name: Matthias Blume
2797    Date: 2001/06/20 16:40:00 EDT
2798    Tag: blume-20010620-cml
2799    Description:
2800    
2801    CML now compiles and works again.
2802    
2803    Libraries (for version > 110.33):
2804    
2805      $cml/cml.cm            Main CML library.
2806      $cml/basis.cm          CML's version of $/basis.cm.
2807      $cml/cml-internal.cm   Internal helper library.
2808      $cml/core-cml.cm       Internal helper library.
2809      $cml-lib/trace-cml.cm  Tracing facility.
2810      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
2811    
2812    The installer (config/install.sh) has been taught how to properly
2813    install this stuff.
2814    
2815    ----------------------------------------------------------------------
2816    Name: Matthias Blume
2817    Date: 2001/06/19 17:55:00 EDT
2818    Tag: blume-20010619-instantiate
2819    Description:
2820    
2821    This un-breaks the fix for bug 1432.
2822    (The bug was originally fixed in 110.9 but I broke it again some
2823    time after that.)
2824    
2825    ----------------------------------------------------------------------
2826    Name: Matthias Blume
2827    Date: 2001/06/19 17:25:00 EDT
2828    Tag: blume-20010619-signals
2829    Description:
2830    
2831    This should (hopefully) fix the long-standing signal handling bug.
2832    (The runtime system was constructing a continuation record with an
2833    incorrect descriptor which would cause the GC to drop data on the floor...)
2834    
2835    ----------------------------------------------------------------------
2836    Name: Matthias Blume
2837    Date: 2001/06/15 15:05:00 EDT
2838    Tag: blume-20010615-moresparc
2839    Description:
2840    
2841    Here is a short late-hour update related to Sparc c-calls:
2842    
2843     -- made handling of double-word arguments a bit smarter
2844    
2845     -- instruction selection phase tries to collapse certain clumsily
2846        constructed ML-Trees; typical example:
2847    
2848            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
2849    
2850        This currently has no further impact on SML/NJ since mlriscGen does
2851        not seem to generate such patterns in the first place, and c-calls
2852        (which did generate them in the beginning) has meanwhile been fixed
2853        so as to avoid them as well.
2854    
2855    ----------------------------------------------------------------------
2856    Name: Matthias Blume
2857    Date: 2001/06/15 15:05:00 EDT
2858    Tag: blume-20010615-sparc
2859    Description:
2860    
2861    The purpose of this update is to provide an implementation of NLFFI
2862    on Sparc machines.
2863    
2864    Here are the changes in detail:
2865    
2866       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
2867       the Sparc implementation of the c-calls API.
2868       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
2869       for accessing the ML frame.  Thus, we have a real frame pointer and
2870       can freely modify %sp without need for an omit-frame-ptr phase.
2871       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
2872       this case.
2873       * ml-nlffigen has been taught to produce code for different architectures
2874       and calling conventions.
2875       * In a way similar to what was done in the x86 case, the Sparc
2876       backend uses its own specific extension to mltree.  (For example,
2877       it needs to be able to generate UNIMP instructions which are part
2878       of the calling convention.)
2879       * ml-nlffi-lib was reorganized to make it more modular (in particular,
2880       to make it easier to plug in new machine- and os-dependent parts).
2881    
2882    There are some other fairly unrelated bug fixes and cleanups as well:
2883    
2884       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
2885       that they properly share their libraries with existing SML/NJ libraries.
2886       * I fixed a minor cosmetic bug in CM, supressing certain spurious
2887       follow-up error messages.
2888       * Updates to CM/CMB documentation.
2889    
2890    TODO items:
2891    
2892       * MLRISC should use a different register as its asmTemp on the Sparc.
2893         (The current %o2 is a really bad choice because it is part of the
2894         calling conventions, so things might interfere in unexpected ways.)
2895    
2896    ----------------------------------------------------------------------
2897    Name: Matthias Blume
2898    Date: 2001/06/07
2899    Tag: blume-20010607-calls
2900    Description:
2901    
2902    A number of internal changes related to C calls and calling conventions:
2903    
2904    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
2905       number of bytes popped implicitly (by the callee).  In most cases
2906       this field is 0 but on x86/win32 it is some non-zero value.  This
2907       is information provided for the benefit of the "omit-frameptr" pass.
2908    2. The CALL instruction on the x86 carries a similar "pops" field.
2909       The instruction selection phase copies its value from the ML-Tree
2910       CALL statement.
2911    3. On all other architectures, the instruction selection phase checks
2912       whether "pops=0" and complains if not.
2913    4. The c-calls implementation for x86 now accepts two calling conventions:
2914       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
2915       up after the call and pops is set to 0.  For "stdcall", the caller
2916       does nothing, leaving the cleanup to the callee; pops is set to
2917       the number of bytes that were pushed onto the stack.
2918    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
2919       distinguish between "ccall" and "stdcall".
2920    6. The UNIMP instruction has been added to the supported Sparc instruction
2921       set. (This is needed for implementing the official C calling convention
2922       on this architecture.)
2923    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
2924       work with the latest CM.
2925    
2926    ----------------------------------------------------------------------
2927    Name: Matthias Blume
2928    Date: 2001/06/05 15:10:00 EDT
2929    Tag: blume-20010605-cm-index
2930    Description:
2931    
2932    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
2933    
2934    1. CM can now generate "index files".  These are human-readable files
2935       that list on a per-.cm-file basis each toplevel symbol defined or
2936       imported.  The location of the index file for
2937       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
2938       To enable index-file generation, set CM.Control.generate_index to true
2939       or export an environment-symbol: export CM_GENERATE_INDEX=true.
2940    
2941       The CM manual has been updated accordingly.
2942    
2943    2. I made some slight modifications to the c-calls API in MLRISC.
2944    
2945         a) There is now a callback to support saving/restoring of
2946            dedicated but caller-save registers around the actual call
2947            instruction.
2948         b) One can optionally specify a comment-annotation for the
2949            call instruction.
2950    
2951    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
2952       (For example, the comment annotation shows the C prototype of
2953        the function being called.)
2954    
2955    ----------------------------------------------------------------------
2956    Name: Matthias Blume
2957    Date: 2001/06/01 13:30:00 EDT
2958    Tag: blume-20010601-nlffi-cleanup
2959    Description:
2960    
2961    This is mostly a cleanup of MLFFI stuff:
2962    
2963       - some signature files have been put into a more exposed place
2964       - the ugly 'f type parameter is gone (simplifies types tremendously!)
2965       - ml-nlffigen changed accordingly
2966       - tutorial updated
2967    
2968    Other changes:
2969    
2970       - author's affiliation in CM manual(s) updated
2971       - some more recognized keywords added to Allen's sml.sty
2972    
2973    ----------------------------------------------------------------------
2974    Name: Matthias Blume
2975    Date: 2001/05/25 15:30:00 EDT
2976    Tag: blume-20010525-iptr
2977    Description:
2978    
2979      - put the official 110.33-README (as it appears on the ftp server) under
2980        CVS
2981      - fixed a small bug related to incomplete pointer types in
2982        ml-nlffigen
2983      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
2984        (it does not need the 'f type parameter)
2985    
2986    ----------------------------------------------------------------------
2987    Name: Matthias Blume
2988    Date: 2001/05/23 14:30:00 EDT
2989    Tag: Release_110_33
2990    Description:
2991    
2992    New version number (110.33).  New bootfiles.
2993    
2994    ----------------------------------------------------------------------
2995    Name: Matthias Blume
2996    Date: 2001/05/22 18:06:00 EDT
2997    Tag: blume-20010522-targets
2998    Description:
2999    
3000    Made install.sh use file config/targets.customized if it exists, falling
3001    back to config/targets if it doesn't.  This way one can have a customized
3002    version of the targets file without touching the "real thing", thus
3003    eliminating the constant fear of accidentally checking something bogus
3004    back into the CVS repository...  (File config/targets.customized must
3005    not be added to the repository!)
3006    
3007    ----------------------------------------------------------------------
3008    Name: Matthias Blume
3009    Date: 2001/05/22 16:30:00 EDT
3010    Tag: blume-20010522-minitut
3011    Description:
3012    
3013    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
3014       struct returns.
3015    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
3016       incomplete, preliminary documentation for NLFFI.
3017    
3018    ----------------------------------------------------------------------
3019    Name: Matthias Blume
3020    Date: 2001/05/14 11:30:00 EDT
3021    Tag: blume-20010514-script
3022    Description:
3023    
3024    Some bugs in install script fixed.
3025    
3026    In addition to that I also made a slight change to the NLFFI API:
3027    Functors generated by ml-nlffigen now take the dynamic library as a
3028    straight functor argument, not as a suspended one.  (The original
3029    functor code used to force the suspension right away anyway, so there
3030    was nothing gained by this complication of the interface.)
3031    
3032    ----------------------------------------------------------------------
3033    Name: Matthias Blume
3034    Date: 2001/05/11 14:35:00 EDT
3035    Tag: blume-20010511-ml-nlffi
3036    Description:
3037    
3038    I finally took the plunge and added my new FFI code to the main
3039    repository.  For x86-linux it is now ready for prime-time.
3040    
3041    There are two new subdirectories of "src":
3042    
3043      - ml-nlffi-lib:
3044           The utility library for programs using the FFI interface.
3045           Here is the implementation of $/c.cm and its associated low-level
3046           partners $/c-int.cm and $/memory.cm.
3047      - ml-nlffigen:
3048           A stand-alone program for generating ML glue code from C source
3049           code.
3050    
3051    Building ml-nlffigen requires $/ckit-lib.cm.
3052    
3053    The config/install.sh script has been updates to do the Right Thing
3054    (hopefully).
3055    
3056    Notice that the source tree for the C-Kit will not be put under "src"
3057    but directly under the installation root directory.  (This is the
3058    structure that currently exists on the CVS server when you check out
3059    module "sml".)  Fortunately, config/install.sh knows about this oddity.
3060    
3061    Bugs: No documentation yet.
3062    
3063    ----------------------------------------------------------------------
3064    Name: Matthias Blume
3065    Date: 2001/05/09 16:35:00 EDT
3066    Tag: blume-20010509-cpscontract
3067    Description:
3068    
3069    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
3070    wrapper/unwrapper elimination did not decrement usage counts and some
3071    dead variables got overlooked by the dead-up logic.)
3072    
3073    ----------------------------------------------------------------------
3074    Name: Lal George
3075    Date: 2001/05/08  17:26:09 EDT
3076    Tag: george-20010508-omit-frameptr
3077    Description:
3078    
3079    Changes to implement the omit-frame-pointer optimization to support
3080    raw C calls. For now, there is only support on the Intel x86, but
3081    other architectures will follow as more experience is gained with this.
3082    
3083    
3084    ----------------------------------------------------------------------
3085    Name: Matthias Blume
3086    Date: 2001/05/07 14:40:00 EDT
3087    Tag: blume-20010507-proxies
3088    Description:
3089    
3090    I made into "proxy libraries" all libraries that qualify for such a
3091    change.  (A qualifying library is a library that has another library or
3092    groups as its sole member and repeats that member's export list
3093    verbatim.  A proxy library avoids this repetition by omitting its export
3094    list, effectively inheriting the list that its (only) member exports.
3095    See the CM manual for more explanation.)
3096    The main effect is that explicit export lists for these libraries
3097    do not have to be kepts in sync, making maintenance a bit easier.
3098    
3099    I also added copyright notices to many .cm-files.
3100    
3101    Last but not least, I made a new set of bootfiles.
3102    
3103    ----------------------------------------------------------------------
3104    Name: Matthias Blume
3105    Date: 2001/05/04 17:00:00 EDT
3106    Tag: blume-20010504-cm-lsplit
3107    Description:
3108    
3109    0. John merged pending changes to $/smlnj-lib.cm
3110    
3111    1. Allen's previous change accidentally backed out of one of Lal's
3112       earlier changes.  I undid this mistake (re-introducing Lal's change).
3113    
3114    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
3115       within the compiler where applicable.  There is some code simplification
3116       because of that.
3117    
3118    3. The "split" phase (in FLINT) is now part of the default list of phases.
3119       Compiler.Control.LambdaSplitting.* can be used to globally control the
3120       lambda-splitting (cross-module-inlining) engine.  In addition to that,
3121       it can now also be controlled on a per-source basis: CM has been taught
3122       a new tool parameter applicable to ML source files.
3123    
3124       - To turn lambda-splitting off completely:
3125            local open Compiler.Control.LambdaSplitting in
3126                val _ = set Off
3127            end
3128       - To make "no lambda-splitting" the global default (but allow per-source
3129         overriding); this is the initial setting:
3130            local open Compiler.Control.LambdaSplitting in
3131                val _ = set (Default NONE)
3132            end
3133       - To make "lambda-splitting with aggressiveness a" the global default
3134         (and allow per-source overriding):
3135            local open Compiler.Control.LambdaSplitting in
3136                val _ = set (Default (SOME a))
3137            end
3138    
3139       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
3140         write (in the respective .cm-file):
3141            a.sml (lambdasplitting:off)
3142       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
3143            a.sml (lambdasplitting:on)
3144       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
3145         <a> is a decimal non-negative integer):
3146            a.sml (lambdasplitting:<a>)
3147       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
3148            a.sml (lambdasplitting:infinity)
3149       - To use the global default for a.sml:
3150            a.sml (lambdasplitting:default)
3151         or simply
3152            a.sml
3153    
3154    ----------------------------------------------------------------------
3155    Name: Allen Leung
3156    Date: 2001/05/04 01:57:00 EDT
3157    Tag: leunga-20010504-sync
3158    Description:
3159    
3160      MLRISC features.
3161    
3162      1. Fix to CMPXCHG instructions.
3163      2. Changed RA interface to allow annotations in callbacks.
3164      3. Added a new method to the stream interface to allow annotations updates.
3165    
3166    ----------------------------------------------------------------------
3167    Name: Matthias Blume
3168    Date: 2001/05/01 11:45:00 EDT
3169    Tag: blume-20010501-pcedittmp
3170    Description:
3171    
3172    Changed install.sh to use the current working directory instead of
3173    /usr/tmp for a temporary file (pcedittmp).  The previous choice
3174    of /usr/tmp caused trouble with MacOS X because of file premission
3175    problems.
3176    
3177    ----------------------------------------------------------------------
3178    Name: Matthias Blume
3179    Date: 2001/04/20 11:10:00 EDT
3180    Tag: blume-20010420-inMLflag
3181    Description:
3182    
3183     - added vp_limitPtrMask to vproc-state.h
3184       (for use by the raw-C-calls mechanism to implement proper interrupt
3185        handling)
3186     - made the ML compiler aware of various data-structure offsets so it
3187       can generate code for accessing the vp_inML flag and vp_limitPtrMask
3188     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
3189       raw C-calls
3190    
3191    ----------------------------------------------------------------------
3192    Name: Lal George
3193    Date: 2001/04/20 09:15:28 EDT
3194    Tag: george-20010420-macosX
3195    Description:
3196    
3197     - Changes to port to Mac OS X; Darwin.
3198    
3199     - In the process I found that sqrt was broken on the PPC, because the
3200       fsqrt instruction is not implemented.
3201    
3202    ----------------------------------------------------------------------
3203    Name: Matthias Blume
3204    Date: 2001/04/18 12:45:00 EDT
3205    Tag: blume-20010418-ccalls
3206    Description:
3207    
3208     - fixed two off-by-4 errors in the x86-specific c-calls implementation
3209       (this bug prevented structure arguments containing pointers from being
3210        passed correctly)
3211     - changed the raw-C-call code in mlriscGen.sml in such a way that
3212       structure arguments are represented as a pointer to the beginning
3213       of the structure (instead of having a series of synthesized arguments,
3214       one for each structure member)
3215    
3216     - made makeml script's verbosity level configurable via environment
3217       variable (MAKEML_VERBOSITY)
3218    
3219     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
3220       in rawmem-x86.sml; we are now using the real thing
3221    
3222    ----------------------------------------------------------------------
3223    Name: Matthias Blume
3224    Date: 2001/03/22 16:25:00 EST
3225    Tag: blume-20010322-bootfiles
3226    Description:
3227    
3228    Created a new set of bootfiles (for your automatic installation convenience).
3229    
3230    ----------------------------------------------------------------------
3231    Name: Matthias Blume
3232    Date: 2001/03/22 15:10:00 EST
3233    Tag: blume-20010322-rawmem-parcm
3234    Description:
3235    
3236    1. All "raw memory access" primitives for the new FFI are implemented now
3237       (at least on the x86).
3238    2. Some further cleanup of CM's parallel make mechanism.
3239    
3240    ----------------------------------------------------------------------
3241    Name: Matthias Blume
3242    Date: 2001/03/19 17:53:00 EST
3243    Tag: blume-20010319-parallel
3244    Description:
3245    
3246    Parallel make (using compile servers) now works again.
3247    
3248    To this end, CM.stabilize and CMB.make have been modified to work in
3249    two passes when compile servers are attached:
3250       1. Compile everything, do not perform stabilization; this pass
3251          uses compile servers
3252       2. Stabilize everything; this pass does not use compile servers
3253    If there are no compile servers, the two passes are combined into one
3254    (as before).  Splitting the passes increases the inherent parallelism
3255    in the dependency graph because the entire graph including all
3256    libraries is available at the same time.  This, in turn, improves
3257    server utilization.  The downside is that the master process will
3258    have to do some extra work after compilation is done (because for
3259    technical reasons it must re-read all the binfiles during stabilization).
3260    
3261    ----------------------------------------------------------------------
3262    Name: Matthias Blume
3263    Date: 2001/03/16 12:22:00 EST
3264    Tag: blume-20010316-bootfiles
3265    Description:
3266    
3267    Created a new set of bootfiles (for your automatic installation convenience).
3268    
3269    ----------------------------------------------------------------------
3270    Name: Matthias Blume
3271    Date: 2001/03/16 11:00:00 EST
3272    Tag: blume-20010316-MLTREE-fixup
3273    Description:
3274    
3275    This is a minor fixup for an (untagged) earlier commit by Allen.
3276    (A file was missing).
3277    
3278    ----------------------------------------------------------------------
3279    Name: Allen Leung
3280    Date: Mon Mar  5 18:54:57 EST 2001
3281    Tag: leunga-20010305-cut-support
3282    
3283    1. New support for alternative control-flow in MLTREE.
3284       Currently we support
3285    
3286          FLOW_TO(CALL ...., [k1,...,kn])
3287    
3288       This is needed for 'cuts to' in C-- and try/handle-like constructs
3289       in Moby
3290    
3291       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
3292    
3293    2. Register Allocator
3294    
3295       Changes in interface [from Fermin, John]
3296    
3297    3. Alpha 8-bit SLL support [Fermin]
3298    
3299    4. All architectures
3300    
3301       A new module (ClusterExpandCopies) for expanding parallel copies.
3302    
3303    ----------------------------------------------------------------------
3304    Name: Allen Leung
3305    Date: 2001/02/27 23:07:00 EST
3306    Tag: leunga-20010227-minor-stuff
3307    
3308    1. Alpha bug fix for CMOVNE
3309    2. Handle mltree COND(..,FCMP ...,...)
3310    3. Bug fix in simplifier
3311    
3312    ----------------------------------------------------------------------
3313    Name: Matthias Blume
3314    Date: 2001/01/30 17:50:00 EST
3315    Tag: blume-20010130-sync
3316    Description:
3317    
3318    This is just a minor update to sync my devel branch with the main brach.
3319    The only visible change is the addition of some README files.
3320    
3321    ----------------------------------------------------------------------
3322    Name: Matthias Blume
3323    Date: 2001/01/12 23:30:00 JST
3324    Tag: blume-20010112-bootfiles
3325    Description:
3326    
3327    Made a new set of bootfiles that goes with the current state of the
3328    repository.
3329    
3330    ----------------------------------------------------------------------
3331    Name: Matthias Blume
3332    Date: 2001/01/12 21:20:00 JST
3333    Tag: blume-20010112-sync
3334    Description:
3335    
3336    I am just flushing out some minor changes that had accumulated in
3337    my private branch in order to sync with the main tree.  (This is
3338    mainly because I had CVS trouble when trying to merge _into_ my
3339    private branch.)
3340    
3341    Most people should be completely unaffected by this.
3342    
3343    ----------------------------------------------------------------------
3344    Name: Allen Leung
3345    Date: Thu Jan 11 21:03:00 EST 2001
3346    Tag: leunga-20010111-labexp=mltree
3347    Description:
3348    
3349    1.  Removed the type LabelExp and replace it by MLTree.
3350    2.  Rewritten mltree-simplify with the pattern matcher tool.
3351    3.  There were some bugs in alpha code generator which would break
3352        64-bit code generation.
3353    4.  Redo the tools to generate code with the
3354    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
3355        are now generated by perl scripts.
3356    
3357    ----------------------------------------------------------------------
3358    Name: Matthias Blume
3359    Date: 2001/01/10 21:55:00 JST
3360    Tag: blume-20010110-rcc
3361    Description:
3362    
3363    The RCC stuff now seems to work (but only on the x86).
3364    This required hacking of the c-calls interface (and -implementation) in
3365    MLRISC.
3366    
3367    Normal compiler users should be unaffected.
3368    
3369    ----------------------------------------------------------------------
3370    Name: Matthias Blume
3371    Date: 2001/01/09 01:20:00 JST
3372    Tag: blume-20010109-rcc
3373    Description:
3374    
3375    This is a fairly big patch, flushing out a large number of pending
3376    changes that I made to my development copy over the last couple of days.
3377    
3378    Of practical relevance at this moment is a workaround for a pickling
3379    bug that Allen ran into the other day.  The cause of the bug itself is
3380    still unknown and it might be hard to fix it properly, but the
3381    workaround has some merits of its own (namely somewhat reducing pickling
3382    overhead for certain libraries).  Therefore, I think this solution should
3383    be satisfactory at this time.
3384    
3385    The rest of the changes (i.e., the vast majority) has to do with my
3386    ongoing efforts of providing direct support for C function calls from
3387    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
3388    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
3389    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
3390    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
3391    handle RCC.
3392    
3393    The last part (the changes to mlriscGen.sml) are still known to be
3394    wrong on the x86 and not implemented on all other architectures.  But
3395    the infrastructure is in place. I had to change a few functor
3396    signatures in the backend to be able to route the CCalls interface
3397    from MLRISC there, and I had to specialize the mltree type (on the
3398    x86) to include the necessary extensions. (The extensions themselves
3399    were already there and redy to go in MLRISC/x86).
3400    
3401    Everything should be very happy as soon as someone helps me with
3402    mlriscGen.sml...
3403    
3404    In any case, nothing of this should matter to anyone as long as the
3405    new primop is not being used (which is going to be the case unless you
3406    find it where I hid it :). The rest of the compiler is completely
3407    unaffected.
3408    
3409    ----------------------------------------------------------------------
3410    Name: Matthias Blume
3411    Date: 2001/01/05 00:30:00 JST
3412    Tag: blume-20010105-primops
3413    Description:
3414    
3415    Added some experimental support for work that I am doing right now.
3416    These changes mostly concern added primops, but there is also a new
3417    experimental C library in the runtime system (but currently not enabled
3418    anywhere except on Linux/X86).
3419    
3420    In the course of adding primops (and playing with them), I discovered that
3421    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
3422    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
3423    To recover, I made type information in INL_PRIM mandatory and changed
3424    prim.sml as well as built-in.sml accordingly.  The InLine structure now
3425    has complete, correct type information (i.e., no bottom types).
3426    
3427    Since all these changes mean that we need new binfiles, I also bumped the
3428    version number to 110.32.1.
3429    
3430    ----------------------------------------------------------------------
3431    Name: Matthias Blume
3432    Date: 2000/12/30 22:10:00 JST
3433    Tag: blume-20001230-various
3434    Description:
3435    
3436    Added proxy libraries for MLRISC and let MLRISC libraries refer
3437    to each other using path anchors.  (See CM manual for explanation.)
3438    
3439    Updated CM documentation.
3440    
3441    Fixed some bugs in CM.
3442    
3443    Implemented "proxy" libraries (= syntactic sugar for CM).
3444    
3445    Added "-quiet" option to makeml and changed runtime system accordingly.
3446    
3447    Added cleanup handler for exportML to reset timers and compiler stats.
3448    
3449    ----------------------------------------------------------------------
3450    Name: Lal George
3451    Date: 2000/12/22 22:22:58 EST 2000
3452    Tag: Release_110_32
3453    Description:
3454    
3455            Infinite precision used throughout MLRISC.
3456            see MLRISC/mltree/machine-int.sig
3457    
3458    ----------------------------------------------------------------------
3459    Name: Matthias Blume
3460    Date: 2000/12/22 23:16:00 JST
3461    Tag: blume-20001222-warn
3462    Description:
3463    
3464    Corrected wording and formatting of some CM warning message which I
3465    broke in my previous patch.
3466    
3467    ----------------------------------------------------------------------
3468    Name: Matthias Blume
3469    Date: 2000/12/22 21:20:00 JST
3470    Tag: blume-20001222-anchorenv
3471    Description:
3472    
3473    Fixed CM's handling of anchor environments in connection with CMB.make.
3474    
3475    ----------------------------------------------------------------------
3476    Name: Matthias Blume
3477    Date: 2000/12/22 13:15:00 JST
3478    Tag: blume-20001222-cleanup
3479    Description:
3480    
3481    Removed src/cm/ffi which does not (and did not) belong here.
3482    
3483    ----------------------------------------------------------------------
3484    Name: Matthias Blume
3485    Date: 2000/12/21 23:55:00 JST
3486    Tag: blume-20001221-exn
3487    Description:
3488    
3489    Probably most important: CM no longer silently swallows all exceptions
3490    in the compiler.
3491    Plus: some other minor CM changes.  For example, CM now reports some
3492    sizes for generated binfiles (code, data, envpickle, lambdapickle).
3493    
3494    ----------------------------------------------------------------------
3495    Name: Matthias Blume
3496    Date: 2000/12/15 00:01:05 JST
3497    Tag: blume-20001215-dirtool
3498    Description:
3499    
3500    - "dir" tool added.
3501    - improvements and cleanup to Tools structure
3502    - documentation updates
3503    
3504    ----------------------------------------------------------------------
3505    Name: Allen Leung
3506    Date: Thu Dec 14 03:45:24 EST 2000
3507    Description:
3508    Tag:  leunga-20001214-int-inf
3509    Description:
3510    
3511       In IntInf, added these standard functions, which are missing from our
3512    implementation:
3513    
3514        andb : int * int -> int
3515        xorb : int * int -> int
3516        orb  : int * int -> int
3517        notb : int -> int
3518         <<   : int * word -> int
3519        ~>>  : int * word -> int
3520    
3521       Not tested, I hope they are correct.
3522    
3523    ----------------------------------------------------------------------
3524    Name: Allen Leung
3525    Date: Fri Dec  8 19:23:26 EST 2000
3526    Description:
3527    Tag:  leunga-20001208-nowhere
3528    Description:
3529    
3530      Slight improvements to the 'nowhere' tool to handle OR-patterns,
3531    to generate better error messages etc.  Plus a brief manual.
3532    
3533    ----------------------------------------------------------------------
3534    Name: Lal George
3535    Date: 2000/12/08 09:54:02 EST 2000
3536    Tag: Release_110_31
3537    Description:
3538    
3539    - Version 110.31
3540    ----------------------------------------------------------------------
3541    Name: Allen Leung
3542    Date: Thu Dec  7 22:01:04 EST 2000
3543    Tag:  leunga-20001207-cell-monster-hack
3544    Description:
3545    
3546    Major MLRISC internal changes.  Affect all clients.
3547    Summary:
3548    
3549    1.  Type CELLS.cell = int is now replaced by a datatype.
3550        As a result, the old regmap is now gone.  Almost all interfaces
3551        in MLRISC change as a consequence.
3552    
3553    2.  A new brand version of machine description tool (v3.0) that generates
3554        modules expecting the new interface.  The old version is removed.
3555    
3556    3.  The RA interface has been further abstracted into two new functors.
3557        RISC_RA and X86RA.  These functors have much simpler interfaces.
3558        [See also directory MLRISC/demo.]
3559    
3560    4.  Some other new source->source code generation tools are available:
3561    
3562        a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
3563        b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
3564           I use this tool to generate the peephole optimizers---with the new
3565           cell type changes, peephole rules are becoming difficult to write
3566           without conditional pattern matching.
3567    
3568    5.  More Intmap -> IntHashTable change.  Previous changes by Matthias didn't
3569        cover the entire MLRISC source tree so many things broke.
3570    
3571    6.  CM files have been moved to the subdirectory MLRISC/cm.
3572        They are moved because there are a lot of them and they clutter up the
3573        root dir.
3574    
3575    7.  More detailed documentation to come...
3576    
3577        NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
3578        a makeml -rebuild first.  This is because of other other
3579        changes that Matthias has made (see below).
3580    
3581    
3582    ----------------------------------------------------------------------
3583    Name: Matthias Blume
3584    Date: 2000/11/30 23:12:00 JST
3585    Tag: blume-20001130-filereorg
3586    Description:
3587    
3588    Some manual updates and some file reorganizations in CM.
3589    
3590    ----------------------------------------------------------------------
3591    Name: Matthias Blume
3592    Date: 2000/11/24 17:45:00 JST
3593    Tag: blume-20001124-link
3594    Description:
3595    
3596    Drastically improved link traversal code for the case that the dynamic
3597    value was already loaded at bootstrap time.  As a result, CM and CMB
3598    now both load blazingly fast -- even on a very slow machine.  Also,
3599    memory consumption has been further reduced by this.
3600    
3601    Warning: The format of the PIDMAP file has changed.  THerefore, to
3602    bootstrap you have to do this:
3603    
3604    1. Run CMB.make
3605    2. Make a symbolic link for the boot directory:
3606         ln -s sml.boot.ARCH-OS xxx
3607    3. "Rebuild" the boot directory:
3608         ./makeml -boot xxx -rebuild sml ; rm xxx
3609    4. Boot normally:
3610          ./makeml
3611    
3612    ----------------------------------------------------------------------
3613    Name: Matthias Blume
3614    Date: 2000/11/21 21:20:00 JST
3615    Tag: blume-20001121-tools
3616    Description:
3617    
3618    Continued hacking on autoloading problem -- with success this time.
3619    Also changed tool-plugin mechanism.  See new CM manual.
3620    
3621    ----------------------------------------------------------------------
3622    Name: Matthias Blume
3623