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revision 890, Thu Jul 19 20:38:56 2001 UTC revision 1029, Fri Jan 18 21:42:35 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  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16    Name: Matthias Blume
17    Date: 2002/01/18
18    Tag: blume-20020118-more-ffifiddle
19    Description:
20    
21    Today's FFI fiddling:
22    
23      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
24        C.Set.* that use concrete (MLRep.*) arguments and results instead
25        of abstract ones.
26    
27      - Provided word-style bit operations etc. for "int" representation
28        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
29        and Long.
30    
31    ----------------------------------------------------------------------
32    Name: Matthias Blume
33    Date: 2002/01/18
34    Tag: blume-20020118-use-x86-fp
35    Description:
36    
37    Now that x86-fast-fp seems to be working, I turned it back on again
38    by default.  (Seems to work fine now, even with the FFI.)
39    
40    Other than that, I added some documentation about the FFI to
41    src/ml-nlffigen/README and updated the FFI test examples in
42    src/ml-nlffi-lib/Tests/*.
43    
44    ----------------------------------------------------------------------
45    Name: Allen Leung
46    Date: 2002/01/17
47    Tag: leunga-20020117-x86-fast-fp-call
48    Description:
49    
50       1. Fixed a problem with handling return fp values when x86's fast fp
51          mode is turned on.
52    
53       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
54          of %f32.
55    
56       3. Added a constructor INT32lit to the ast of MLRISC tools.
57    
58    ----------------------------------------------------------------------
59    Name: Matthias Blume
60    Date: 2002/01/16
61    Tag: blume-20020116-ffifiddle
62    Description:
63    
64    More fiddling with the FFI interface:
65    
66     - Make constness 'c instead of rw wherever possible.  This eliminates
67       the need for certain explicit coercions.  (However, due to ML's
68       value polymorphism, there will still be many cases where explicit
69       coercions are necessary.  Phantom types are not the whole answer
70       to modeling a subtyping relationship in ML.)
71    
72     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
73    
74     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
75       clumsy workaround for varargs problem.)
76    
77    ----------------------------------------------------------------------
78    Name: Lal George
79    Date: 2002/01/15
80    Tag: <none>
81    Description:
82    
83    1. Since COPY instructions are no longer native to the architecture,
84       a generic functor can be used to implement the expandCopies function.
85    
86    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
87       TEXT segment.
88    
89    ----------------------------------------------------------------------
90    Name: Matthias Blume
91    Date: 2002/01/15
92    Tag: blume-20020115-ffiupdates
93    Description:
94    
95    1. Fix for bug resulting in single-precision float values being returned
96       incorrectly from FFI calls.
97    
98    2. Small modifications to C FFI API:
99    
100        - memory-allocation routines return straight objects (no options)
101          and raise an exception in out-of-memory situations
102        - unsafe extensions to cast between function pointers and pointers
103          from/to ints
104        - added structure C_Debug as an alternative to structure C where
105          pointer-dereferencing (|*| and |*!) always check for null-pointers
106        - added open_lib' to DynLinkage;  open_lib' works like open_lib
107          but also takes a (possibly empty) list of existing library handles
108          that the current library depends on
109    
110    ----------------------------------------------------------------------
111    Name: Matthias Blume
112    Date: 2002/01/10
113    Tag: blume-20020110-newffigen
114    Description:
115    
116    1. Updates to portable graph code.
117    
118    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
119       more scalable now so that even huge interfaces such as the one
120       for GTK compile in finite time and space. :-)
121       See src/ml-nlffigen/README for details on what's new.
122    
123    ----------------------------------------------------------------------
124    Name: Lal George
125    Date: 2001/01/09 14:31:35 EST 2002
126    Tag: george-20011206-rm-native-copy
127    Description:
128    
129            Removed the native COPY and FCOPY instructions
130            from all the architectures and replaced it with the
131            explicit COPY instruction from the previous commit.
132    
133            It is now possible to simplify many of the optimizations
134            modules that manipulate copies. This has not been
135            done in this change.
136    
137    ----------------------------------------------------------------------
138    Name: Lal George
139    Date: 2001/12/06 16:50:13 EST 2001
140    Tag: george-20011206-mlrisc-instruction
141    Description:
142    
143    Changed the representation of instructions from being fully abstract
144    to being partially concrete. That is to say:
145    
146      from
147            type instruction
148    
149      to
150            type instr                              (* machine instruction *)
151    
152            datatype instruction =
153                LIVE of {regs: C.cellset, spilled: C.cellset}
154              | KILL of {regs: C.cellset, spilled: C.cellset}
155              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
156              | ANNOTATION of {i: instruction, a: Annotations.annotation}
157              | INSTR of instr
158    
159    This makes the handling of certain special instructions that appear on
160    all architectures easier and uniform.
161    
162    LIVE and KILL say that a list of registers are live or killed at the
163    program point where they appear. No spill code is generated when an
164    element of the 'regs' field is spilled, but the register is moved to
165    the 'spilled' (which is present, more for debugging than anything else).
166    
167    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
168    We used to generate:
169    
170            DEFFREG f1
171            f1 := f2 + f3
172            trapb
173    
174    but now generate:
175    
176            f1 := f2 + f3
177            trapb
178            LIVE {regs=[f1,f2,f3], spilled=[]}
179    
180    Furthermore, the DEFFREG (hack) required that all floating point instruction
181    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
182    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
183    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
184    this architecture).
185    
186    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
187    all the architectures. This will result in further simplification of the
188    register allocator that must be aware of them for coalescing purposes, and
189    will also simplify certain aspects of the machine description that provides
190    callbacks related to parallel copies.
191    
192    ANNOTATION should be obvious, and now INSTR represents the honest to God
193    machine instruction set!
194    
195    The <arch>/instructions/<arch>Instr.sml files define certain utility
196    functions for making porting easier -- essentially converting upper case
197    to lower case. All machine instructions (of type instr) are in upper case,
198    and the lower case form generates an MLRISC instruction. For example on
199    the alpha we have:
200    
201      datatype instr =
202         LDA of {r:cell, b:cell, d:operand}
203       | ...
204    
205      val lda : {r:cell, b:cell, d:operand} -> instruction
206        ...
207    
208    where lda is just (INSTR o LDA), etc.
209    
210    ----------------------------------------------------------------------
211    Name: Matthias Blume
212    Date: 2001/11/22 21:40:00 EST
213    Tag: Release_110_37
214    Description:
215    
216    Release 110.37.  This time for real.
217    
218    ----------------------------------------------------------------------
219    Name: Matthias Blume
220    Date: 2001/11/21 16:35:00 EST
221    Tag: blume-20011121-foot-in-mouth
222    Description:
223    
224    Removed the "Release_110_37" tag because of a serious bug.
225    This will be re-tagged once the bug is fixed.
226    
227    ----------------------------------------------------------------------
228    Name: Matthias Blume
229    Date: 2001/11/21 16:14:00 EST
230    Tag: blume-20011121-forgottenfile
231    Description:
232    
233    Forgot to add a file.  (Just a .tex-file -- part of
234    the CM manual source.)
235    
236    ----------------------------------------------------------------------
237    Name: Matthias Blume
238    Date: 2001/11/21 16:10:00 EST
239    Tag: blume-20011121-invalid_110_37
240    Description:
241    
242    Note: I removed the original tag "Release_110_37" from this commit
243          because we found a serious bug in all non-x86 backends.
244          - Matthias
245    
246    1. Modifications to the SML/NJ code generator and to the runtime system
247       so that code object name strings are directly inserted into code
248       objects at code generation time.  The only business the runtime system
249       has with this is now to read the name strings on occasions.
250       (The encoding of the name string has also changed somewhat.)
251    
252    2. CM now implements a simple "set calculus" for specifying export lists.
253       In particular, it is now possible to refer to the export lists of
254       other libraries/groups/sources and form unions as well as differences.
255       See the latest CM manual for details.
256    
257    3. An separate notion of "proxy" libraries has again be eliminated from
258       CM's model.  (Proxy libraries are now simply a special case of using
259       the export list calculus.)
260    
261    4. Some of the existing libraries now take advantage of the new set
262       calculus.
263       (Notice that not all libraries have been converted because some
264       of the existing .cm-files are supposed to be backward compatible
265       with 110.0.x.)
266    
267    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
268       "General.exnMessage"!  The former relies on a certain hook to be
269       initialized, and that often does not happen in the stand-alone case.)
270    
271    ----------------------------------------------------------------------
272    Name: Lal George
273    Date: 2001/11/21  13:56:18 EST
274    Tag: george-2001121-pseudo-ops
275    Description:
276    
277      Implemented a complete redesign of MLRISC pseudo-ops. Now there
278      ought to never be any question of incompatabilities with
279      pseudo-op syntax expected by host assemblers.
280    
281      For now, only modules supporting GAS syntax are implemented
282      but more should follow, such as MASM, and vendor assembler
283      syntax, e.g. IBM as, Sun as, etc.
284    
285    ----------------------------------------------------------------------
286    Name: Matthias Blume
287    Date: 2001/11/14 11:52:00 EST
288    Tag: blume-20011114-srcname
289    Description:
290    
291    1. Routed the name of the current source file to mlriscgen where it
292       should be directly emitted into the code object.  (This last part
293       is yet to be done.)
294    
295    2. Some cleanup of the pgraph code to make it match the proposal that
296       I put out the other day.  (The proposal notwithstanding, things are
297       still in flux here.)
298    
299    ----------------------------------------------------------------------
300    Name: Lal George
301    Date: 2001/11/14 09:44:04 EST
302    Tag:
303    Description:
304    
305      Fix for a backpatching bug reported by Allen.
306    
307      Because the boundary between short and long span-dependent
308      instructions is +/- 128, there are an astounding number of
309      span-dependent instructions whose size is over estimated.
310    
311      Allen came up with the idea of letting the size of span
312      dependent instructions be non-monotonic, for a maxIter
313      number of times, after which the size must be monotonically
314      increasing.
315    
316      This table shows the number of span-dependent instructions
317      whose size was over-estimated as a function of maxIter, for the
318      file Parse/parse/ml.grm.sml:
319    
320         maxIter            # of instructions:
321            10                      687
322            20                      438
323            30                      198
324            40                        0
325    
326      In compiling the compiler, there is no significant difference in
327      compilation speed between maxIter=10 and maxIter=40. Actually,
328      my measurements showed that maxIter=40 was a tad faster than
329      maxIter=10! Also 96% of the  files in the compiler reach a fix
330      point within 13 iterations, so fixing maxIter at 40, while high,
331      is okay.
332    
333    ----------------------------------------------------------------------
334    Name: Matthias Blume
335    Date: 2001/10/31 15:25:00 EST
336    Tag: blume-20011031-pgraph
337    Description:
338    
339    CKIT:
340    * Changed the "Function" constructor of type Ast.ctype to carry optional
341      argument identifiers.
342    * Changed the return type of TypeUtil.getFunction accordingly.
343    * Type equality ignores the argument names.
344    * TypeUtil.composite tries to preserve argument names but gives up quickly
345      if there is a mismatch.
346    
347    installation script:
348    * attempts to use "curl" if available (unless "wget" is available as well)
349    
350    CM:
351    * has an experimental implementation of "portable graphs" which I will
352      soon propose as an implementation-independent library format
353    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
354    
355    NLFFI-LIB:
356    * some cleanup (all cosmetic)
357    
358    NLFFIGEN:
359    * temporarily disabled the mechanism that suppresses ML output for
360      C definitions whose identifiers start with an underscore character
361    * generate val bindings for enum constants
362    * user can request that only one style (light or heavy) is being used;
363      default is to use both (command-line arguments: -heavy and -light)
364    * fixed bug in handling of function types involving incomplete pointers
365    * generate ML entry points that take record arguments (i.e., using
366      named arguments) for C functions that have a prototype with named
367      arguments
368      (see changes to CKIT)
369    
370    ----------------------------------------------------------------------
371    Name: Allen Leung
372    Date: 2001/10/27 20:34:00 EDT
373    Tag: leunga-20011027-x86-fast-fp-call
374    Description:
375    
376       Fixed the bug described in blume-20010920-slowfp.
377    
378       The fix involves
379          1. generating FCOPYs in FSTP in ia32-svid
380          2. marking a CALL with the appropriate annotation
381    
382    ----------------------------------------------------------------------
383    Name: Matthias Blume
384    Date: 2001/10/16 11:32:00 EDT
385    Tag: blume-20011016-netbsd
386    Description:
387    
388    Underscore patch from Chris Richards (fixing problem with compiling
389    runtime system under recent NetBSD).
390    
391    ----------------------------------------------------------------------
392    Name: Allen Leung
393    Date: 2001/10/12 17:18:32 EDT 2001
394    Tag: leung-20011012-x86-printflowgraph
395    Description:
396    
397    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
398    
399    ----------------------------------------------------------------------
400    Name: Lal George
401    Date: 2001/10/11 23:51:34 EDT
402    Tag: george-20011011-too-many-instrs
403    Description:
404    
405    The representation of a program point never expected to see more
406    than 65536 instructions in a basic block!
407    
408    ----------------------------------------------------------------------
409    Name: Lal George
410    Date: 2001/10/09 09:41:37 EDT
411    Tag: george-20011008-mlrisc-labels
412    Description:
413    
414    Changed the machine description files to support printing of
415    local and global labels in assembly code, based on host assembler
416    conventions.
417    
418    ----------------------------------------------------------------------
419    Name: Matthias Blume
420    Date: 2001/09/25 15:25:00 EDT
421    Tag: blume-20010925-exninfo
422    Description:
423    
424    I provided a non-hook implementation of exnName (at the toplevel) and
425    made the "dummy" implementation of exnMessage (at the toplevel) more
426    useful: if nothing gets "hooked in", then at least you are going to
427    see the exception name and a message indicating why you don't see more.
428    
429    [For the time being, programs that need exnMessage and want to use
430    ml-build should either use General.exnMessage (strongly recommended) or
431    refer to structure General at some other point so that CM sees a
432    static dependency.]
433    
434    [Similar remarks go for "print" and "use":  If you want to use their
435    functionality in stand-alone programs generated by ml-build, then use
436    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
437    
438    ----------------------------------------------------------------------
439    Name: Matthias Blume
440    Date: 2001/09/20 17:28:00 EDT
441    Tag: blume-20010920-slowfp
442    Description:
443    
444    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
445    
446    ----------------------------------------------------------------------
447    Name: Matthias Blume
448    Date: 2001/09/20 17:20:00 EDT
449    Tag: blume-20010920-canonicalpaths
450    Description:
451    
452    0. Updated the BOOT file (something that I forgot to do earlier).
453    
454    1. Small internal change to CM so that it avoids "/../" in filenames
455       as much as possible (but only where it is safe).
456    
457    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
458       that arguments that contain delimiters are passed through correctly.
459       This change also means that all "special" arguments of the form
460       @SMLxxx... must come first.
461    
462    3. Changed install script to put relative anchor names for tool commands
463       into pathconfig.
464    
465    ----------------------------------------------------------------------
466    Name: Matthias Blume
467    >>>>>>> 1.169
468    Date: 2001/09/18 15:35:00 EDT
469    Tag: blume-20010918-readme11036
470    Description:
471    
472    Added README files.
473    
474    ----------------------------------------------------------------------
475    Name: Matthias Blume
476    Date: 2001/09/18 11:45:00 EDT
477    Tag: Release_110_36 (retag)
478    Description:
479    
480    Fixed mistake in config/preloads. Retagged as 110.36.
481    
482    ----------------------------------------------------------------------
483    Name: Matthias Blume
484    Date: 2001/09/18 09:40:00 EDT
485    Tag: Release_110_36_orig (tag changed)
486    Description:
487    
488    New version (110.36).  New bootfiles.
489    
490    ----------------------------------------------------------------------
491    Name: Matthias Blume
492    Date: 2001/09/14 16:15:00 EDT
493    Tag: blume-20010914-x86fastfp
494    Description:
495    
496    John committed some changes that Allen made, in particular a (hopefully)
497    correctly working version of the x86-fp module.
498    
499    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
500    flag to "true".  Everything seems to compile to a fixpoint ok, and
501    "mandelbrot" speeds up by about 15%.
502    
503    ----------------------------------------------------------------------
504    Name: Matthias Blume
505    Date: 2001/09/13 11:20:00 EDT
506    Tag: blume-20010913-minimal
507    Description:
508    
509    1. Stefan Monnier's patch to fix a miscompilation problem that
510       was brought to light by John Reppy's work on Moby.
511    
512    2. Implemented a minimal "structure Compiler" that contains just
513       "version" and "architecture".  The minimal version will be
514       available when the full version is not.  This is for backward-
515       compatibility with code that wants to test Compiler.version.
516    
517    ----------------------------------------------------------------------
518    Name: Matthias Blume
519    Date: 2001/08/28 14:03:00 EDT
520    Tag: blume-20010828-ml-lex
521    Description:
522    
523    Fix for bug 1581, received from Neophytos Michael.
524    
525    ----------------------------------------------------------------------
526    Name: Matthias Blume
527    Date: 2001/08/27 11:20:00 EDT
528    Tag: blume-20010827-readme11035
529    Description:
530    
531    Fleshed out the README file for 110.35.
532    
533    ----------------------------------------------------------------------
534    Name: Matthias Blume
535    Date: 2001/08/24 17:10:00 EDT
536    Tag: Release_110_35
537    Description:
538    
539    New version number (110.35).  New bootfiles.
540    
541    ----------------------------------------------------------------------
542    Name: Lal George
543    Date: 2001/08/24 13:47:18 EDT 2001
544    Tag: george-20010824-MLRISC-graphs
545    Description:
546    
547     removed clusters from MLRISC completely and replaced with graphs.
548    
549    ----------------------------------------------------------------------
550    Name: Matthias Blume
551    Date: 2001/08/23 17:50:00 EDT
552    Tag: blume-20010823-toplevel
553    Description:
554    
555    - some reorganization of the code that implements various kinds of
556      environments in the compiler (static, dynamic, symbolic, combined)
557    - re-implemented the EnvRef module so that evalStream works properly
558      (if the stream contains references to "use", "CM.make", etc.)
559    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
560    
561    ----------------------------------------------------------------------
562    Name: Matthias Blume
563    Date: 2001/08/20 15:50 EDT
564    Tag: blume20010820-slipup
565    Description:
566    
567    I forgot to commit a few files.  Here they are...
568    
569    ----------------------------------------------------------------------
570    Name: Matthias Blume
571    Date: 2001/08/20 15:35:00 EDT
572    Tag: blume-20010820-debugprof
573    Description:
574    
575    !!!! NEW BOOTFILES !!!!
576    
577    This is another round of reorganizing the compiler sources.  This
578    time the main goal was to factor out all the "instrumentation"
579    passes (for profiling and backtracing) into their own library.
580    The difficulty was to do it in such a way that it does not depend
581    on elaborate.cm but only on elabdata.cm.
582    
583    Therefore there have been further changes to both elaborate.cm and
584    elabdata.cm -- more "generic" things have been moved from the former
585    to the latter.  As a result, I was forced to split the assignment
586    of numbers indicating "primtyc"s into two portions: SML-generic and
587    SML/NJ-specific.  Since it would have been awkward to maintain,
588    I bit the bullet and actually _changed_ the mapping between these
589    numbers and primtycs.  The bottom line of this is that you need
590    a new set of bin- and bootfiles.
591    
592    I have built new bootfiles for all architectures, so doing a fresh
593    checkout and config/install.sh should be all you need.
594    
595    The newly created library's name is
596    
597        $smlnj/viscomp/debugprof.cm
598    
599    and its sources live under
600    
601        src/compiler/DebugProf
602    
603    ----------------------------------------------------------------------
604    Name: Matthias Blume
605    Date: 2001/08/15 17:15:00 EDT
606    Tag: blume-20010815-compreorg
607    Description:
608    
609    This is a first cut at reorganizing the CM libraries that make up the
610    core of the compiler.  The idea is to separate out pieces that could
611    be used independently by tools, e.g., the parser, the typechecker, etc.
612    
613    The current status is a step in this direction, but it is not quite
614    satisfactory yet.  Expect more changes in the future.
615    
616    Here is the current (new) organization...
617    
618        What used to be $smlnj/viscomp/core.cm is now divided into
619        six CM libraries:
620    
621             $smlnj/viscomp/basics.cm
622                           /parser.cm
623                           /elabdata.cm
624                           /elaborate.cm
625                           /execute.cm
626                           /core.cm
627    
628        The CM files for these libraries live under src/system/smlnj/viscomp.
629        All these libraries are proxy libraries that contain precisely
630        one CM library component.  Here are the locations of the components
631        (all within the src/compiler tree):
632    
633             Basics/basics.cm
634             Parse/parser.cm
635             ElabData/elabdata.cm
636             Elaborator/elaborate.cm
637             Execution/execute.cm
638             core.cm
639    
640         [This organization is the same that has been used already
641         for a while for the architecture-specific parts of the visible
642         compiler and for the old version of core.cm.]
643    
644         As you will notice, many source files have been moved from their
645         respective original locations to a new home in one of the above
646         subtrees.
647    
648         The division of labor between the new libraries is the following:
649    
650             basics.cm:
651                - Simple, basic definitions that pertain to many (or all) of
652                  the other libraries.
653             parser.cm:
654                - The SML parser, producing output of type Ast.dec.
655                - The type family for Ast is also defined and exported here.
656             elabdata.cm:
657                - The datatypes that describe input and output of the elaborator.
658                  This includes types, absyn, and static environments.
659             elaborator.cm:
660                - The SML/NJ type checker and elaborator.
661                  This maps an Ast.dec (with a given static environment) to
662                  an Absyn.dec (with a new static environment).
663                - This libraries implements certain modules that used to be
664                  structures as functors (to remove dependencies on FLINT).
665             execute.cm:
666                - Everything having to do with executing binary code objects.
667                - Dynamic environments.
668             core.cm:
669                - SML/NJ-specific instantiations of the elaborator and MLRISC.
670                - Top-level modules.
671                - FLINT (this should eventually become its own library)
672    
673    Notes:
674    
675    I am not 100% happy with the way I separated the elaborator (and its
676    data structures) from FLINT.  Two instances of the same problem:
677    
678        1. Data structures contain certain fields that carry FLINT-specific
679           information.  I hacked around this using exn and the property list
680           module from smlnj-lib.  But the fact that there are middle-end
681           specific fields around at all is a bit annoying.
682    
683        2. The elaborator calculates certain FLINT-related information.  I tried
684           to make this as abstract as I could using functorization, but, again,
685           the fact that the elaborator has to perform calculations on behalf
686           of the middle-end at all is not nice.
687    
688        3. Having to used exn and property lists is unfortunate because it
689           weakens type checking.  The other alternative (parameterizing
690           nearly *everything*) is not appealing, though.
691    
692    I removed the "rebinding =" warning hack because due to the new organization
693    it was awkward to maintain it.  As a result, the compiler now issues some of
694    these warnings when compiling init.cmi during bootstrap compilation. On
695    the plus side, you also get a warning when you do, for example:
696       val op = = Int32.+
697    which was not the case up to now.
698    
699    I placed "assign" and "deref" into the _Core structure so that the
700    code that deals with the "lazy" keyword can find them there.  This
701    removes the need for having access to the primitive environment
702    during elaboration.
703    
704    ----------------------------------------------------------------------
705    Name: Matthias Blume
706    Date: 2001/08/13
707    Tag: blume-20010813-closures
708    Description:
709    
710    This fix was sent to us by Zhong Shao.  It is supposed to improve the
711    performance of certain loops by avoiding needless closure allocation.
712    
713    ----------------------------------------------------------------------
714    Name: Lal George
715    Date: 2001/07/31 10:03:23 EDT 2001
716    Tag: george-20010731-x86-fmalloc
717    Description: Fixed bug in x86 calls
718    
719        There was a bug where call instructions would mysteriously
720        vanish. The call instruction had to be one that returned
721        a floating point value.
722    
723    ----------------------------------------------------------------------
724  Name: Lal George  Name: Lal George
725  Date: 2001/07/19 16:36:29 EDT 2001  Date: 2001/07/19 16:36:29 EDT 2001
726  Tag: george-20010719-simple-cells  Tag: george-20010719-simple-cells
# Line 2733  Line 3441 
3441       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3442       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3443       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
3444       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3445       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3446       Dave's hands. :)       Dave's hands. :)
3447    

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