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Diff of /sml/trunk/HISTORY

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revision 645, Mon May 15 07:17:30 2000 UTC revision 653, Wed Jun 7 07:59:06 2000 UTC
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13  Description:  Description:
14  ----------------------------------------------------------------------  ----------------------------------------------------------------------
15  Name: Matthias Blume  Name: Matthias Blume
16    Date: 2000/06/07 17:00:00 JST
17    Tag: blume-20000607-no-implicit-anchors
18    Description:
19    
20    1. This update changes the default setting for
21    CM.Control.implicit_anchors from true to false.  This means that
22    implicit anchors are no longer permitted by default.  I also tried to
23    make sure that nothing else still relies on implicit anchors.
24    (This is the next step on the schedule towards a CM that does not even
25    have the notion of implicit anchors anymore.)
26    
27    2. More CM manual updates.
28    
29    3. I managed to track down and fix the pickling bug I mentioned last
30    time.  Because of the previously existing workaround, this entails no
31    immediate practical changes.
32    
33    ----------------------------------------------------------------------
34    Name: Matthias Blume
35    Date: 2000/06/06 11:15:00 JST
36    Tag: blume-20000606-lazierpickle
37    Description:
38    
39    !!!! NEW BOOT FILES !!!!
40    
41    * The main purpose of this update is to make library pickles lazier in
42    order to reduce the initial space penalty for autoloading a library.
43    As a result, it is now possible to have $smlnj/compiler.cm
44    pre-registered.  This should take care of the many complaints or
45    inquiries about missing structure Compiler.  This required changes to
46    CM's internal data structures and small tweaks to some algorithms.
47    
48    As a neat additional effect, it is no longer necessary (for the sake
49    of lean heap image files) to distinguish between a "minimal" CM and a
50    "full" CM.  Now, there is only one CM (i.e., the "full" version:
51    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
52    interactive top level. ($smlnj/cm/minimal.cm is gone.)
53    
54    To make the life of compiler-hackers easier, "makeml" now also
55    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
56    words, after you bootstrap a new sml for the first time, you will not
57    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
58    around you will still have to do it, though.)
59    
60    * A second change consists of major updates to the CM manual.  There
61    are now several appendices with summary information and also a full
62    specification of the CM description file syntax.
63    
64    * In directory src/system I added the script "allcross".  This script
65    invokes sml and cross-compiles the compiler for all supported
66    architectures.  (Useful when providing a new set of boot files.)
67    
68    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
69    added a small tweak to pickle-util.sml to work around this problem,
70    but it is not a proper fix yet.  I will investigate further.  (The
71    effect of the bug was an inflation of library pickle size.)
72    
73    * Version number increased to 110.28.1 (to avoid compatibility problems).
74    
75    ----------------------------------------------------------------------
76    Name: Allen Leung
77    Date: 2000/05/25 17:28 EDT
78    Tag: leunga-20000525-ra
79    Description:
80    
81      Fixed a bug in freezing phase of the register allocator.
82    
83    ----------------------------------------------------------------------
84    Name: Allen Leung
85    Date: 2000/05/15 22:53 EDT
86    Tag: leunga-20000515-alpha-x86-ra
87    Description:
88    
89      1. Alpha
90    
91          Slight cleanup.  Removed the instruction SGNXL
92    
93      2. X86
94    
95          Added the following instructions to the instruction set:
96    
97            ROLx, RORx,
98            BTx, BTSx, BTLx, BTRx,
99            XCHGx, and variants with the LOCK prefix
100    
101      3. Register Allocation
102    
103          The module ra-rewrite-with-renaming has been improved.
104    
105      These have no effect on SML/NJ.
106    
107    ----------------------------------------------------------------------
108    Name: Matthias Blume
109  Date: 2000/05/15 16:20:00 JST  Date: 2000/05/15 16:20:00 JST
110  Tag: blume-20000515-lightrebuild  Tag: blume-20000515-lightrebuild
111  Description:  Description:

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