Home My Page Projects Code Snippets Project Openings SML/NJ
Summary Activity Forums Tracker Lists Tasks Docs Surveys News SCM Files

SCM Repository

[smlnj] Diff of /sml/trunk/HISTORY
ViewVC logotype

Diff of /sml/trunk/HISTORY

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 826, Wed May 9 20:32:17 2001 UTC revision 1015, Tue Jan 15 21:46:00 2002 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    Name: Matthias Blume
16    Date: 2002/01/15
17    Tag: blume-20020115-ffiupdates
18    Description:
19    
20    1. Fix for bug resulting in single-precision float values being returned
21       incorrectly from FFI calls.
22    
23    2. Small modifications to C FFI API:
24    
25        - memory-allocation routines return straight objects (no options)
26          and raise an exception in out-of-memory situations
27        - unsafe extensions to cast between function pointers and pointers
28          from/to ints
29        - added structure C_Debug as an alternative to structure C where
30          pointer-dereferencing (|*| and |*!) always check for null-pointers
31        - added open_lib' to DynLinkage;  open_lib' works like open_lib
32          but also takes a (possibly empty) list of existing library handles
33          that the current library depends on
34    
35    ----------------------------------------------------------------------
36    Name: Matthias Blume
37    Date: 2002/01/10
38    Tag: blume-20020110-newffigen
39    Description:
40    
41    1. Updates to portable graph code.
42    
43    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
44       more scalable now so that even huge interfaces such as the one
45       for GTK compile in finite time and space. :-)
46       See src/ml-nlffigen/README for details on what's new.
47    
48    ----------------------------------------------------------------------
49    Name: Lal George
50    Date: 2001/01/09 14:31:35 EST 2002
51    Tag: george-20011206-rm-native-copy
52    Description:
53    
54            Removed the native COPY and FCOPY instructions
55            from all the architectures and replaced it with the
56            explicit COPY instruction from the previous commit.
57    
58            It is now possible to simplify many of the optimizations
59            modules that manipulate copies. This has not been
60            done in this change.
61    
62    ----------------------------------------------------------------------
63    Name: Lal George
64    Date: 2001/12/06 16:50:13 EST 2001
65    Tag: george-20011206-mlrisc-instruction
66    Description:
67    
68    Changed the representation of instructions from being fully abstract
69    to being partially concrete. That is to say:
70    
71      from
72            type instruction
73    
74      to
75            type instr                              (* machine instruction *)
76    
77            datatype instruction =
78                LIVE of {regs: C.cellset, spilled: C.cellset}
79              | KILL of {regs: C.cellset, spilled: C.cellset}
80              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
81              | ANNOTATION of {i: instruction, a: Annotations.annotation}
82              | INSTR of instr
83    
84    This makes the handling of certain special instructions that appear on
85    all architectures easier and uniform.
86    
87    LIVE and KILL say that a list of registers are live or killed at the
88    program point where they appear. No spill code is generated when an
89    element of the 'regs' field is spilled, but the register is moved to
90    the 'spilled' (which is present, more for debugging than anything else).
91    
92    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
93    We used to generate:
94    
95            DEFFREG f1
96            f1 := f2 + f3
97            trapb
98    
99    but now generate:
100    
101            f1 := f2 + f3
102            trapb
103            LIVE {regs=[f1,f2,f3], spilled=[]}
104    
105    Furthermore, the DEFFREG (hack) required that all floating point instruction
106    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
107    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
108    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
109    this architecture).
110    
111    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
112    all the architectures. This will result in further simplification of the
113    register allocator that must be aware of them for coalescing purposes, and
114    will also simplify certain aspects of the machine description that provides
115    callbacks related to parallel copies.
116    
117    ANNOTATION should be obvious, and now INSTR represents the honest to God
118    machine instruction set!
119    
120    The <arch>/instructions/<arch>Instr.sml files define certain utility
121    functions for making porting easier -- essentially converting upper case
122    to lower case. All machine instructions (of type instr) are in upper case,
123    and the lower case form generates an MLRISC instruction. For example on
124    the alpha we have:
125    
126      datatype instr =
127         LDA of {r:cell, b:cell, d:operand}
128       | ...
129    
130      val lda : {r:cell, b:cell, d:operand} -> instruction
131        ...
132    
133    where lda is just (INSTR o LDA), etc.
134    
135    ----------------------------------------------------------------------
136    Name: Matthias Blume
137    Date: 2001/11/22 21:40:00 EST
138    Tag: Release_110_37
139    Description:
140    
141    Release 110.37.  This time for real.
142    
143    ----------------------------------------------------------------------
144    Name: Matthias Blume
145    Date: 2001/11/21 16:35:00 EST
146    Tag: blume-20011121-foot-in-mouth
147    Description:
148    
149    Removed the "Release_110_37" tag because of a serious bug.
150    This will be re-tagged once the bug is fixed.
151    
152    ----------------------------------------------------------------------
153    Name: Matthias Blume
154    Date: 2001/11/21 16:14:00 EST
155    Tag: blume-20011121-forgottenfile
156    Description:
157    
158    Forgot to add a file.  (Just a .tex-file -- part of
159    the CM manual source.)
160    
161    ----------------------------------------------------------------------
162    Name: Matthias Blume
163    Date: 2001/11/21 16:10:00 EST
164    Tag: blume-20011121-invalid_110_37
165    Description:
166    
167    Note: I removed the original tag "Release_110_37" from this commit
168          because we found a serious bug in all non-x86 backends.
169          - Matthias
170    
171    1. Modifications to the SML/NJ code generator and to the runtime system
172       so that code object name strings are directly inserted into code
173       objects at code generation time.  The only business the runtime system
174       has with this is now to read the name strings on occasions.
175       (The encoding of the name string has also changed somewhat.)
176    
177    2. CM now implements a simple "set calculus" for specifying export lists.
178       In particular, it is now possible to refer to the export lists of
179       other libraries/groups/sources and form unions as well as differences.
180       See the latest CM manual for details.
181    
182    3. An separate notion of "proxy" libraries has again be eliminated from
183       CM's model.  (Proxy libraries are now simply a special case of using
184       the export list calculus.)
185    
186    4. Some of the existing libraries now take advantage of the new set
187       calculus.
188       (Notice that not all libraries have been converted because some
189       of the existing .cm-files are supposed to be backward compatible
190       with 110.0.x.)
191    
192    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
193       "General.exnMessage"!  The former relies on a certain hook to be
194       initialized, and that often does not happen in the stand-alone case.)
195    
196    ----------------------------------------------------------------------
197    Name: Lal George
198    Date: 2001/11/21  13:56:18 EST
199    Tag: george-2001121-pseudo-ops
200    Description:
201    
202      Implemented a complete redesign of MLRISC pseudo-ops. Now there
203      ought to never be any question of incompatabilities with
204      pseudo-op syntax expected by host assemblers.
205    
206      For now, only modules supporting GAS syntax are implemented
207      but more should follow, such as MASM, and vendor assembler
208      syntax, e.g. IBM as, Sun as, etc.
209    
210    ----------------------------------------------------------------------
211    Name: Matthias Blume
212    Date: 2001/11/14 11:52:00 EST
213    Tag: blume-20011114-srcname
214    Description:
215    
216    1. Routed the name of the current source file to mlriscgen where it
217       should be directly emitted into the code object.  (This last part
218       is yet to be done.)
219    
220    2. Some cleanup of the pgraph code to make it match the proposal that
221       I put out the other day.  (The proposal notwithstanding, things are
222       still in flux here.)
223    
224    ----------------------------------------------------------------------
225    Name: Lal George
226    Date: 2001/11/14 09:44:04 EST
227    Tag:
228    Description:
229    
230      Fix for a backpatching bug reported by Allen.
231    
232      Because the boundary between short and long span-dependent
233      instructions is +/- 128, there are an astounding number of
234      span-dependent instructions whose size is over estimated.
235    
236      Allen came up with the idea of letting the size of span
237      dependent instructions be non-monotonic, for a maxIter
238      number of times, after which the size must be monotonically
239      increasing.
240    
241      This table shows the number of span-dependent instructions
242      whose size was over-estimated as a function of maxIter, for the
243      file Parse/parse/ml.grm.sml:
244    
245         maxIter            # of instructions:
246            10                      687
247            20                      438
248            30                      198
249            40                        0
250    
251      In compiling the compiler, there is no significant difference in
252      compilation speed between maxIter=10 and maxIter=40. Actually,
253      my measurements showed that maxIter=40 was a tad faster than
254      maxIter=10! Also 96% of the  files in the compiler reach a fix
255      point within 13 iterations, so fixing maxIter at 40, while high,
256      is okay.
257    
258    ----------------------------------------------------------------------
259    Name: Matthias Blume
260    Date: 2001/10/31 15:25:00 EST
261    Tag: blume-20011031-pgraph
262    Description:
263    
264    CKIT:
265    * Changed the "Function" constructor of type Ast.ctype to carry optional
266      argument identifiers.
267    * Changed the return type of TypeUtil.getFunction accordingly.
268    * Type equality ignores the argument names.
269    * TypeUtil.composite tries to preserve argument names but gives up quickly
270      if there is a mismatch.
271    
272    installation script:
273    * attempts to use "curl" if available (unless "wget" is available as well)
274    
275    CM:
276    * has an experimental implementation of "portable graphs" which I will
277      soon propose as an implementation-independent library format
278    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
279    
280    NLFFI-LIB:
281    * some cleanup (all cosmetic)
282    
283    NLFFIGEN:
284    * temporarily disabled the mechanism that suppresses ML output for
285      C definitions whose identifiers start with an underscore character
286    * generate val bindings for enum constants
287    * user can request that only one style (light or heavy) is being used;
288      default is to use both (command-line arguments: -heavy and -light)
289    * fixed bug in handling of function types involving incomplete pointers
290    * generate ML entry points that take record arguments (i.e., using
291      named arguments) for C functions that have a prototype with named
292      arguments
293      (see changes to CKIT)
294    
295    ----------------------------------------------------------------------
296    Name: Allen Leung
297    Date: 2001/10/27 20:34:00 EDT
298    Tag: leunga-20011027-x86-fast-fp-call
299    Description:
300    
301       Fixed the bug described in blume-20010920-slowfp.
302    
303       The fix involves
304          1. generating FCOPYs in FSTP in ia32-svid
305          2. marking a CALL with the appropriate annotation
306    
307    ----------------------------------------------------------------------
308    Name: Matthias Blume
309    Date: 2001/10/16 11:32:00 EDT
310    Tag: blume-20011016-netbsd
311    Description:
312    
313    Underscore patch from Chris Richards (fixing problem with compiling
314    runtime system under recent NetBSD).
315    
316    ----------------------------------------------------------------------
317    Name: Allen Leung
318    Date: 2001/10/12 17:18:32 EDT 2001
319    Tag: leung-20011012-x86-printflowgraph
320    Description:
321    
322    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
323    
324    ----------------------------------------------------------------------
325    Name: Lal George
326    Date: 2001/10/11 23:51:34 EDT
327    Tag: george-20011011-too-many-instrs
328    Description:
329    
330    The representation of a program point never expected to see more
331    than 65536 instructions in a basic block!
332    
333    ----------------------------------------------------------------------
334    Name: Lal George
335    Date: 2001/10/09 09:41:37 EDT
336    Tag: george-20011008-mlrisc-labels
337    Description:
338    
339    Changed the machine description files to support printing of
340    local and global labels in assembly code, based on host assembler
341    conventions.
342    
343    ----------------------------------------------------------------------
344    Name: Matthias Blume
345    Date: 2001/09/25 15:25:00 EDT
346    Tag: blume-20010925-exninfo
347    Description:
348    
349    I provided a non-hook implementation of exnName (at the toplevel) and
350    made the "dummy" implementation of exnMessage (at the toplevel) more
351    useful: if nothing gets "hooked in", then at least you are going to
352    see the exception name and a message indicating why you don't see more.
353    
354    [For the time being, programs that need exnMessage and want to use
355    ml-build should either use General.exnMessage (strongly recommended) or
356    refer to structure General at some other point so that CM sees a
357    static dependency.]
358    
359    [Similar remarks go for "print" and "use":  If you want to use their
360    functionality in stand-alone programs generated by ml-build, then use
361    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
362    
363    ----------------------------------------------------------------------
364    Name: Matthias Blume
365    Date: 2001/09/20 17:28:00 EDT
366    Tag: blume-20010920-slowfp
367    Description:
368    
369    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
370    
371    ----------------------------------------------------------------------
372    Name: Matthias Blume
373    Date: 2001/09/20 17:20:00 EDT
374    Tag: blume-20010920-canonicalpaths
375    Description:
376    
377    0. Updated the BOOT file (something that I forgot to do earlier).
378    
379    1. Small internal change to CM so that it avoids "/../" in filenames
380       as much as possible (but only where it is safe).
381    
382    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
383       that arguments that contain delimiters are passed through correctly.
384       This change also means that all "special" arguments of the form
385       @SMLxxx... must come first.
386    
387    3. Changed install script to put relative anchor names for tool commands
388       into pathconfig.
389    
390    ----------------------------------------------------------------------
391    Name: Matthias Blume
392    >>>>>>> 1.169
393    Date: 2001/09/18 15:35:00 EDT
394    Tag: blume-20010918-readme11036
395    Description:
396    
397    Added README files.
398    
399    ----------------------------------------------------------------------
400    Name: Matthias Blume
401    Date: 2001/09/18 11:45:00 EDT
402    Tag: Release_110_36 (retag)
403    Description:
404    
405    Fixed mistake in config/preloads. Retagged as 110.36.
406    
407    ----------------------------------------------------------------------
408    Name: Matthias Blume
409    Date: 2001/09/18 09:40:00 EDT
410    Tag: Release_110_36_orig (tag changed)
411    Description:
412    
413    New version (110.36).  New bootfiles.
414    
415    ----------------------------------------------------------------------
416    Name: Matthias Blume
417    Date: 2001/09/14 16:15:00 EDT
418    Tag: blume-20010914-x86fastfp
419    Description:
420    
421    John committed some changes that Allen made, in particular a (hopefully)
422    correctly working version of the x86-fp module.
423    
424    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
425    flag to "true".  Everything seems to compile to a fixpoint ok, and
426    "mandelbrot" speeds up by about 15%.
427    
428    ----------------------------------------------------------------------
429    Name: Matthias Blume
430    Date: 2001/09/13 11:20:00 EDT
431    Tag: blume-20010913-minimal
432    Description:
433    
434    1. Stefan Monnier's patch to fix a miscompilation problem that
435       was brought to light by John Reppy's work on Moby.
436    
437    2. Implemented a minimal "structure Compiler" that contains just
438       "version" and "architecture".  The minimal version will be
439       available when the full version is not.  This is for backward-
440       compatibility with code that wants to test Compiler.version.
441    
442    ----------------------------------------------------------------------
443    Name: Matthias Blume
444    Date: 2001/08/28 14:03:00 EDT
445    Tag: blume-20010828-ml-lex
446    Description:
447    
448    Fix for bug 1581, received from Neophytos Michael.
449    
450    ----------------------------------------------------------------------
451    Name: Matthias Blume
452    Date: 2001/08/27 11:20:00 EDT
453    Tag: blume-20010827-readme11035
454    Description:
455    
456    Fleshed out the README file for 110.35.
457    
458    ----------------------------------------------------------------------
459    Name: Matthias Blume
460    Date: 2001/08/24 17:10:00 EDT
461    Tag: Release_110_35
462    Description:
463    
464    New version number (110.35).  New bootfiles.
465    
466    ----------------------------------------------------------------------
467    Name: Lal George
468    Date: 2001/08/24 13:47:18 EDT 2001
469    Tag: george-20010824-MLRISC-graphs
470    Description:
471    
472     removed clusters from MLRISC completely and replaced with graphs.
473    
474    ----------------------------------------------------------------------
475    Name: Matthias Blume
476    Date: 2001/08/23 17:50:00 EDT
477    Tag: blume-20010823-toplevel
478    Description:
479    
480    - some reorganization of the code that implements various kinds of
481      environments in the compiler (static, dynamic, symbolic, combined)
482    - re-implemented the EnvRef module so that evalStream works properly
483      (if the stream contains references to "use", "CM.make", etc.)
484    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
485    
486    ----------------------------------------------------------------------
487    Name: Matthias Blume
488    Date: 2001/08/20 15:50 EDT
489    Tag: blume20010820-slipup
490    Description:
491    
492    I forgot to commit a few files.  Here they are...
493    
494    ----------------------------------------------------------------------
495    Name: Matthias Blume
496    Date: 2001/08/20 15:35:00 EDT
497    Tag: blume-20010820-debugprof
498    Description:
499    
500    !!!! NEW BOOTFILES !!!!
501    
502    This is another round of reorganizing the compiler sources.  This
503    time the main goal was to factor out all the "instrumentation"
504    passes (for profiling and backtracing) into their own library.
505    The difficulty was to do it in such a way that it does not depend
506    on elaborate.cm but only on elabdata.cm.
507    
508    Therefore there have been further changes to both elaborate.cm and
509    elabdata.cm -- more "generic" things have been moved from the former
510    to the latter.  As a result, I was forced to split the assignment
511    of numbers indicating "primtyc"s into two portions: SML-generic and
512    SML/NJ-specific.  Since it would have been awkward to maintain,
513    I bit the bullet and actually _changed_ the mapping between these
514    numbers and primtycs.  The bottom line of this is that you need
515    a new set of bin- and bootfiles.
516    
517    I have built new bootfiles for all architectures, so doing a fresh
518    checkout and config/install.sh should be all you need.
519    
520    The newly created library's name is
521    
522        $smlnj/viscomp/debugprof.cm
523    
524    and its sources live under
525    
526        src/compiler/DebugProf
527    
528    ----------------------------------------------------------------------
529    Name: Matthias Blume
530    Date: 2001/08/15 17:15:00 EDT
531    Tag: blume-20010815-compreorg
532    Description:
533    
534    This is a first cut at reorganizing the CM libraries that make up the
535    core of the compiler.  The idea is to separate out pieces that could
536    be used independently by tools, e.g., the parser, the typechecker, etc.
537    
538    The current status is a step in this direction, but it is not quite
539    satisfactory yet.  Expect more changes in the future.
540    
541    Here is the current (new) organization...
542    
543        What used to be $smlnj/viscomp/core.cm is now divided into
544        six CM libraries:
545    
546             $smlnj/viscomp/basics.cm
547                           /parser.cm
548                           /elabdata.cm
549                           /elaborate.cm
550                           /execute.cm
551                           /core.cm
552    
553        The CM files for these libraries live under src/system/smlnj/viscomp.
554        All these libraries are proxy libraries that contain precisely
555        one CM library component.  Here are the locations of the components
556        (all within the src/compiler tree):
557    
558             Basics/basics.cm
559             Parse/parser.cm
560             ElabData/elabdata.cm
561             Elaborator/elaborate.cm
562             Execution/execute.cm
563             core.cm
564    
565         [This organization is the same that has been used already
566         for a while for the architecture-specific parts of the visible
567         compiler and for the old version of core.cm.]
568    
569         As you will notice, many source files have been moved from their
570         respective original locations to a new home in one of the above
571         subtrees.
572    
573         The division of labor between the new libraries is the following:
574    
575             basics.cm:
576                - Simple, basic definitions that pertain to many (or all) of
577                  the other libraries.
578             parser.cm:
579                - The SML parser, producing output of type Ast.dec.
580                - The type family for Ast is also defined and exported here.
581             elabdata.cm:
582                - The datatypes that describe input and output of the elaborator.
583                  This includes types, absyn, and static environments.
584             elaborator.cm:
585                - The SML/NJ type checker and elaborator.
586                  This maps an Ast.dec (with a given static environment) to
587                  an Absyn.dec (with a new static environment).
588                - This libraries implements certain modules that used to be
589                  structures as functors (to remove dependencies on FLINT).
590             execute.cm:
591                - Everything having to do with executing binary code objects.
592                - Dynamic environments.
593             core.cm:
594                - SML/NJ-specific instantiations of the elaborator and MLRISC.
595                - Top-level modules.
596                - FLINT (this should eventually become its own library)
597    
598    Notes:
599    
600    I am not 100% happy with the way I separated the elaborator (and its
601    data structures) from FLINT.  Two instances of the same problem:
602    
603        1. Data structures contain certain fields that carry FLINT-specific
604           information.  I hacked around this using exn and the property list
605           module from smlnj-lib.  But the fact that there are middle-end
606           specific fields around at all is a bit annoying.
607    
608        2. The elaborator calculates certain FLINT-related information.  I tried
609           to make this as abstract as I could using functorization, but, again,
610           the fact that the elaborator has to perform calculations on behalf
611           of the middle-end at all is not nice.
612    
613        3. Having to used exn and property lists is unfortunate because it
614           weakens type checking.  The other alternative (parameterizing
615           nearly *everything*) is not appealing, though.
616    
617    I removed the "rebinding =" warning hack because due to the new organization
618    it was awkward to maintain it.  As a result, the compiler now issues some of
619    these warnings when compiling init.cmi during bootstrap compilation. On
620    the plus side, you also get a warning when you do, for example:
621       val op = = Int32.+
622    which was not the case up to now.
623    
624    I placed "assign" and "deref" into the _Core structure so that the
625    code that deals with the "lazy" keyword can find them there.  This
626    removes the need for having access to the primitive environment
627    during elaboration.
628    
629    ----------------------------------------------------------------------
630    Name: Matthias Blume
631    Date: 2001/08/13
632    Tag: blume-20010813-closures
633    Description:
634    
635    This fix was sent to us by Zhong Shao.  It is supposed to improve the
636    performance of certain loops by avoiding needless closure allocation.
637    
638    ----------------------------------------------------------------------
639    Name: Lal George
640    Date: 2001/07/31 10:03:23 EDT 2001
641    Tag: george-20010731-x86-fmalloc
642    Description: Fixed bug in x86 calls
643    
644        There was a bug where call instructions would mysteriously
645        vanish. The call instruction had to be one that returned
646        a floating point value.
647    
648    ----------------------------------------------------------------------
649    Name: Lal George
650    Date: 2001/07/19 16:36:29 EDT 2001
651    Tag: george-20010719-simple-cells
652    Description:
653    
654    I have dramatically simplified the interface for CELLS in MLRISC.
655    
656    In summary, the cells interface is broken up into three parts:
657    
658      1. CellsBasis : CELLS_BASIS
659    
660            CellsBasis is a top level structure and common for all
661            architectures.  it contains the definitions of basic datatypes
662            and utility  functions over these types.
663    
664      2. functor Cells() : CELLS
665    
666            Cells generates an interface for CELLS that incorporates the
667            specific resources on the target architecture, such as the
668            presence of special register classes, their number and size,
669            and various useful substructures.
670    
671      3. <ARCH>CELLS
672    
673            e.g. SparcCells: SPARCCELLS
674    
675            <ARCH>CELLS usually contains additional bindings for special
676            registers  on the architecture, such as:
677    
678                    val r0 : cell           (* register zero *)
679                    val y : cell            (* Y register *)
680                    val psr : cell          (* processor status register *)
681                    ...
682    
683            The structure returned by applying the Cells functor is opened
684            in this interface.
685    
686    The main implication of all this is that the datatypes for cells is
687    split between CellsBasis and CELLS -- a fairly simple change for user
688    code.
689    
690    In the old scheme the CELLS interface had a definitional binding of
691    the form:
692    
693            signature CELLS = sig
694    
695               structure CellsBasis = CellsBasis
696    
697               ...
698    
699            end
700    
701    With all the sharing constraints that goes on in MLRISC, this old
702    design  quickly leads to errors such as:
703    
704            "structure definition spec inside of sharing ... "
705    
706    
707    and appears to require an unacceptable amount of sharing and where
708    constraint hackery.
709    
710    I think this error message (the interaction of definitional specs and
711    sharing) requires more explanation on our web page.
712    
713    ----------------------------------------------------------------------
714    Name: Matthias Blume
715    Date: 2001/07/19 15:00:00 EDT
716    Tag: blume-20010719-libreorg
717    Description:
718    
719    This update puts together a fairly extensive but straightforward change
720    to the way the libraries that implement the interactive system are
721    organized:
722    
723       The biggest change is the elimination of structure Compiler.  As a
724       replacement for this structure, there is now a CM library
725       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
726       that exports all the substructures of the original structure Compiler
727       directly.  So instead of saying Compiler.Foo.bar one now simply
728       says Foo.bar.  (The CM libraries actually export a collection of
729       structures that is richer than the collection of substructures of
730       structure Compiler.)
731    
732       To make the transition smooth, there is a separate library called
733       $smlnj/compiler/compiler.cm which puts together and exports the
734       original structure Compiler (or at least something very close to it).
735    
736       There are five members of the original structure Compiler
737       that are not exported directly but which instead became members
738       of a new structure Backend (described by signature BACKEND).  These are:
739       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
740       Interact (: INTERACT), structure Machine (: MACHINE), and val
741       architecture (: string).
742    
743       Structure Compiler.Version has become structure CompilerVersion.
744    
745       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
746       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
747       or x86, respectively.
748       Each of these exports the same frontend structures that
749       $smlnj/compiler.cm exports.  But they do not have a structure Backend
750       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
751       Hppa, PPC, Sparc, or X86, respectively.
752    
753       Library $smlnj/compiler/all.cm exports the union of the exports of
754       $smlnj/compiler/<arch>.cm
755    
756       There are no structures <Arch>Compiler anymore, use
757       $smlnj/compiler/<arch>.cm instead.
758    
759       Library host-compiler-0.cm is gone.  Instead, the internal library
760       that instantiates CM is now called cm0.cm.  Selection of the host
761       compiler (backend) is no longer done here but. (Responsibility for it
762       now lies with $smlnj/compiler/current.cm.  This seems to be more
763       logical.)
764    
765       Many individual files have been moved or renamed.  Some files have
766       been split into multiple files, and some "dead" files have been deleted.
767    
768    Aside from these changes to library organization, there are also changes
769    to the way the code itself is organized:
770    
771       Structure Binfile has been re-implemented in such a way that it no
772       longer needs any knowledge of the compiler.  It exclusively deals
773       with the details of binfile layout.  It no longer invokes the
774       compiler (for the purpose of creating new prospective binfile
775       content), and it no longer has any knowledge of how to interpret
776       pickles.
777    
778       Structure Compile (: COMPILE) has been stripped down to the bare
779       essentials of compilation.  It no longer deals with linking/execution.
780       The interface has been cleaned up considerably.
781    
782       Utility routines for dealing with linking and execution have been
783       moved into their own substructures.
784    
785       (The ultimate goal of these changes is to provide a light-weight
786       binfile loader/linker (at least for, e.g., stable libraries) that
787       does not require CM or the compiler to be present.)
788    
789    CM documentation has been updated to reflect the changes to library
790    organization.
791    
792    ----------------------------------------------------------------------
793    Name: Matthias Blume
794    Date: 2001/07/10 17:30:00 EDT
795    Tag: Release_110_34
796    Description:
797    
798    Minor tweak to 110.34 (re-tagged):
799    
800      - README.html file added to CVS repository
801      - runtime compiles properly under FreeBSD 3.X and 4.X
802    
803    ----------------------------------------------------------------------
804    Name: Matthias Blume
805    Date: 2001/07/10 17:30:00 EDT
806    Tag: Release_110_34
807    Description:
808    
809    New version number (110.34). New bootfiles.
810    
811    ----------------------------------------------------------------------
812    Name: Matthias Blume
813    Date: 2001/07/09 16:00:00 EDT
814    Tag: blume-20010709-more-varargs
815    Description:
816    
817    I changed the handling of varargs in ml-nlffigen again:
818    The ellipsis ... will now simply be ignored (with an accompanying warning).
819    
820    The immediate effect is that you can actually call a varargs function
821    from ML -- but you can't actually supply any arguments beyond the ones
822    specified explicitly.  (For example, you can call printf with its format
823    string, but you cannot pass additional arguments.)
824    
825    This behavior is only marginally more useful than the one before, but
826    it has the advantage that a function or, more importantly, a function
827    type never gets dropped on the floor, thus avoiding follow-up problems with
828    other types that refer to the offending one.
829    
830    ----------------------------------------------------------------------
831    Name: Matthias Blume
832    Date: 2001/07/09 11:25:00 EDT
833    Tag: blume-20010709-varargs
834    Description:
835    
836    1. ckit-lib.cm now exports structure Error
837    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
838       with a warning accompanied by a source location.  Moreover, it
839       merely skips the offending function or type and proceeds with the
840       rest of its work.u  As a result, one can safely feed C code containing
841       "..." to ml-nlffigen.
842    3. There are some internal improvements to CM, providing slightly
843       more general string substitutions in the tools subsystem.
844    
845    ----------------------------------------------------------------------
846    Name: Matthias Blume
847    Date: 2001/06/27 15:10:00 EDT
848    Tag: blume-20010627-concur
849    Description:
850    
851    Fixed a small bug in CM's handling of parallel compilation.
852    (You could observe the bug by Control-C-interrupting an ordinary
853    CMB.make or CM.stabilize and then attaching some compile servers.
854    The result was that all of a sudden the previously interrupted
855    compilation would continue on its own.  This was because of
856    an over-optimization: CM did not bother to clean out certain queues
857    when no servers were attached "anyway", resulting in the contents
858    of these queues to grab control when new servers did get attached.)
859    
860    There is also another minor update to the CM manual.
861    
862    ----------------------------------------------------------------------
863    Name: Matthias Blume
864    Date: 2001/06/26 16:15:00 EDT
865    Tag: blume-20010626-cmdoc
866    Description:
867    
868    Minor typo fixed in CM manual (syntax diagram for libraries).
869    
870    ----------------------------------------------------------------------
871    Name: Matthias Blume
872    Date: 2001/06/25 22:55:00 EDT
873    Tag: blume-20010625-x86pc
874    Description:
875    
876    Fixed a nasty bug in the X86 assembly code that caused signal
877    handlers to fail (crash) randomly.
878    
879    ----------------------------------------------------------------------
880    Name: Matthias Blume
881    Date: 2001/06/25 12:05:00 EDT
882    Tag: blume-20010625-nlffigen
883    Description:
884    
885    This update fixes a number of minor bugs in ml-nlffigen as reported by
886    Nick Carter <nbc@andrew.cmu.edu>.
887    
888      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
889      2. Default names for generated files are now derived from the name of
890         the C file *without its directory*.  In particular, this causes generated
891         files to be placed locally even if the C file is in some system directory.
892      3. Default names for generated signatures and structures are also derived
893         from the C file name without its directory.  This avoids silly things
894         like "structure GL/GL".
895         (Other silly names are still possible because ml-nlffigen does not do
896          a thorough check of whether generated names are legal ML identifiers.
897          When in doubt, use command line arguments to force particular names.)
898    
899    ----------------------------------------------------------------------
900    Name: Matthias Blume
901    Date: 2001/06/21 12:25:00 EDT
902    Tag: blume-20010621-eXene
903    Description:
904    
905    eXene now compiles and (sort of) works again.
906    
907    The library name (for version > 110.33) is $/eXene.cm.
908    
909    I also added an new example in src/eXene/examples/nbody.  See the
910    README file there for details.
911    
912    ----------------------------------------------------------------------
913    Name: Matthias Blume
914    Date: 2001/06/20 16:40:00 EDT
915    Tag: blume-20010620-cml
916    Description:
917    
918    CML now compiles and works again.
919    
920    Libraries (for version > 110.33):
921    
922      $cml/cml.cm            Main CML library.
923      $cml/basis.cm          CML's version of $/basis.cm.
924      $cml/cml-internal.cm   Internal helper library.
925      $cml/core-cml.cm       Internal helper library.
926      $cml-lib/trace-cml.cm  Tracing facility.
927      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
928    
929    The installer (config/install.sh) has been taught how to properly
930    install this stuff.
931    
932    ----------------------------------------------------------------------
933    Name: Matthias Blume
934    Date: 2001/06/19 17:55:00 EDT
935    Tag: blume-20010619-instantiate
936    Description:
937    
938    This un-breaks the fix for bug 1432.
939    (The bug was originally fixed in 110.9 but I broke it again some
940    time after that.)
941    
942    ----------------------------------------------------------------------
943    Name: Matthias Blume
944    Date: 2001/06/19 17:25:00 EDT
945    Tag: blume-20010619-signals
946    Description:
947    
948    This should (hopefully) fix the long-standing signal handling bug.
949    (The runtime system was constructing a continuation record with an
950    incorrect descriptor which would cause the GC to drop data on the floor...)
951    
952    ----------------------------------------------------------------------
953    Name: Matthias Blume
954    Date: 2001/06/15 15:05:00 EDT
955    Tag: blume-20010615-moresparc
956    Description:
957    
958    Here is a short late-hour update related to Sparc c-calls:
959    
960     -- made handling of double-word arguments a bit smarter
961    
962     -- instruction selection phase tries to collapse certain clumsily
963        constructed ML-Trees; typical example:
964    
965            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
966    
967        This currently has no further impact on SML/NJ since mlriscGen does
968        not seem to generate such patterns in the first place, and c-calls
969        (which did generate them in the beginning) has meanwhile been fixed
970        so as to avoid them as well.
971    
972    ----------------------------------------------------------------------
973    Name: Matthias Blume
974    Date: 2001/06/15 15:05:00 EDT
975    Tag: blume-20010615-sparc
976    Description:
977    
978    The purpose of this update is to provide an implementation of NLFFI
979    on Sparc machines.
980    
981    Here are the changes in detail:
982    
983       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
984       the Sparc implementation of the c-calls API.
985       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
986       for accessing the ML frame.  Thus, we have a real frame pointer and
987       can freely modify %sp without need for an omit-frame-ptr phase.
988       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
989       this case.
990       * ml-nlffigen has been taught to produce code for different architectures
991       and calling conventions.
992       * In a way similar to what was done in the x86 case, the Sparc
993       backend uses its own specific extension to mltree.  (For example,
994       it needs to be able to generate UNIMP instructions which are part
995       of the calling convention.)
996       * ml-nlffi-lib was reorganized to make it more modular (in particular,
997       to make it easier to plug in new machine- and os-dependent parts).
998    
999    There are some other fairly unrelated bug fixes and cleanups as well:
1000    
1001       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
1002       that they properly share their libraries with existing SML/NJ libraries.
1003       * I fixed a minor cosmetic bug in CM, supressing certain spurious
1004       follow-up error messages.
1005       * Updates to CM/CMB documentation.
1006    
1007    TODO items:
1008    
1009       * MLRISC should use a different register as its asmTemp on the Sparc.
1010         (The current %o2 is a really bad choice because it is part of the
1011         calling conventions, so things might interfere in unexpected ways.)
1012    
1013    ----------------------------------------------------------------------
1014    Name: Matthias Blume
1015    Date: 2001/06/07
1016    Tag: blume-20010607-calls
1017    Description:
1018    
1019    A number of internal changes related to C calls and calling conventions:
1020    
1021    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
1022       number of bytes popped implicitly (by the callee).  In most cases
1023       this field is 0 but on x86/win32 it is some non-zero value.  This
1024       is information provided for the benefit of the "omit-frameptr" pass.
1025    2. The CALL instruction on the x86 carries a similar "pops" field.
1026       The instruction selection phase copies its value from the ML-Tree
1027       CALL statement.
1028    3. On all other architectures, the instruction selection phase checks
1029       whether "pops=0" and complains if not.
1030    4. The c-calls implementation for x86 now accepts two calling conventions:
1031       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
1032       up after the call and pops is set to 0.  For "stdcall", the caller
1033       does nothing, leaving the cleanup to the callee; pops is set to
1034       the number of bytes that were pushed onto the stack.
1035    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1036       distinguish between "ccall" and "stdcall".
1037    6. The UNIMP instruction has been added to the supported Sparc instruction
1038       set. (This is needed for implementing the official C calling convention
1039       on this architecture.)
1040    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1041       work with the latest CM.
1042    
1043    ----------------------------------------------------------------------
1044    Name: Matthias Blume
1045    Date: 2001/06/05 15:10:00 EDT
1046    Tag: blume-20010605-cm-index
1047    Description:
1048    
1049    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1050    
1051    1. CM can now generate "index files".  These are human-readable files
1052       that list on a per-.cm-file basis each toplevel symbol defined or
1053       imported.  The location of the index file for
1054       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1055       To enable index-file generation, set CM.Control.generate_index to true
1056       or export an environment-symbol: export CM_GENERATE_INDEX=true.
1057    
1058       The CM manual has been updated accordingly.
1059    
1060    2. I made some slight modifications to the c-calls API in MLRISC.
1061    
1062         a) There is now a callback to support saving/restoring of
1063            dedicated but caller-save registers around the actual call
1064            instruction.
1065         b) One can optionally specify a comment-annotation for the
1066            call instruction.
1067    
1068    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1069       (For example, the comment annotation shows the C prototype of
1070        the function being called.)
1071    
1072    ----------------------------------------------------------------------
1073    Name: Matthias Blume
1074    Date: 2001/06/01 13:30:00 EDT
1075    Tag: blume-20010601-nlffi-cleanup
1076    Description:
1077    
1078    This is mostly a cleanup of MLFFI stuff:
1079    
1080       - some signature files have been put into a more exposed place
1081       - the ugly 'f type parameter is gone (simplifies types tremendously!)
1082       - ml-nlffigen changed accordingly
1083       - tutorial updated
1084    
1085    Other changes:
1086    
1087       - author's affiliation in CM manual(s) updated
1088       - some more recognized keywords added to Allen's sml.sty
1089    
1090    ----------------------------------------------------------------------
1091    Name: Matthias Blume
1092    Date: 2001/05/25 15:30:00 EDT
1093    Tag: blume-20010525-iptr
1094    Description:
1095    
1096      - put the official 110.33-README (as it appears on the ftp server) under
1097        CVS
1098      - fixed a small bug related to incomplete pointer types in
1099        ml-nlffigen
1100      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1101        (it does not need the 'f type parameter)
1102    
1103    ----------------------------------------------------------------------
1104    Name: Matthias Blume
1105    Date: 2001/05/23 14:30:00 EDT
1106    Tag: Release_110_33
1107    Description:
1108    
1109    New version number (110.33).  New bootfiles.
1110    
1111    ----------------------------------------------------------------------
1112    Name: Matthias Blume
1113    Date: 2001/05/22 18:06:00 EDT
1114    Tag: blume-20010522-targets
1115    Description:
1116    
1117    Made install.sh use file config/targets.customized if it exists, falling
1118    back to config/targets if it doesn't.  This way one can have a customized
1119    version of the targets file without touching the "real thing", thus
1120    eliminating the constant fear of accidentally checking something bogus
1121    back into the CVS repository...  (File config/targets.customized must
1122    not be added to the repository!)
1123    
1124    ----------------------------------------------------------------------
1125    Name: Matthias Blume
1126    Date: 2001/05/22 16:30:00 EDT
1127    Tag: blume-20010522-minitut
1128    Description:
1129    
1130    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1131       struct returns.
1132    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
1133       incomplete, preliminary documentation for NLFFI.
1134    
1135    ----------------------------------------------------------------------
1136    Name: Matthias Blume
1137    Date: 2001/05/14 11:30:00 EDT
1138    Tag: blume-20010514-script
1139    Description:
1140    
1141    Some bugs in install script fixed.
1142    
1143    In addition to that I also made a slight change to the NLFFI API:
1144    Functors generated by ml-nlffigen now take the dynamic library as a
1145    straight functor argument, not as a suspended one.  (The original
1146    functor code used to force the suspension right away anyway, so there
1147    was nothing gained by this complication of the interface.)
1148    
1149    ----------------------------------------------------------------------
1150    Name: Matthias Blume
1151    Date: 2001/05/11 14:35:00 EDT
1152    Tag: blume-20010511-ml-nlffi
1153    Description:
1154    
1155    I finally took the plunge and added my new FFI code to the main
1156    repository.  For x86-linux it is now ready for prime-time.
1157    
1158    There are two new subdirectories of "src":
1159    
1160      - ml-nlffi-lib:
1161           The utility library for programs using the FFI interface.
1162           Here is the implementation of $/c.cm and its associated low-level
1163           partners $/c-int.cm and $/memory.cm.
1164      - ml-nlffigen:
1165           A stand-alone program for generating ML glue code from C source
1166           code.
1167    
1168    Building ml-nlffigen requires $/ckit-lib.cm.
1169    
1170    The config/install.sh script has been updates to do the Right Thing
1171    (hopefully).
1172    
1173    Notice that the source tree for the C-Kit will not be put under "src"
1174    but directly under the installation root directory.  (This is the
1175    structure that currently exists on the CVS server when you check out
1176    module "sml".)  Fortunately, config/install.sh knows about this oddity.
1177    
1178    Bugs: No documentation yet.
1179    
1180  ----------------------------------------------------------------------  ----------------------------------------------------------------------
1181  Name: Matthias Blume  Name: Matthias Blume
# Line 2201  Line 3366 
3366       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3367       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3368       Please, don't be too harsh on me for messing with this code a bit more       Please, don't be too harsh on me for messing with this code a bit more
3369       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3370       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3371       Dave's hands. :)       Dave's hands. :)
3372    

Legend:
Removed from v.826  
changed lines
  Added in v.1015

root@smlnj-gforge.cs.uchicago.edu
ViewVC Help
Powered by ViewVC 1.0.0