X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=NEWS;h=962c9d204e67df76439aab1c4ddb81a73dad4a1f;hb=d1c237164f9bd00879843cba7a79c05449cf50f7;hp=a601e15b4ea47fcfef867a042459b3b8bcaa6af4;hpb=3bd7a97d1b11a2b0aee086ef211cae807f3dfc35;p=sbcl.git diff --git a/NEWS b/NEWS index a601e15..962c9d2 100644 --- a/NEWS +++ b/NEWS @@ -739,6 +739,12 @@ changes in sbcl-0.6.13 relative to sbcl-0.6.12: * a port to the Compaq/DEC Alpha CPU, thanks to Dan Barlow * Martin Atzmueller ported Tim Moore's marvellous CMU CL DISASSEMBLE patch, so that DISASSEMBLE output is much nicer. +* The code in the SB-PROFILE package now seems reasonably stable. + I still haven't decided what the final interface should look like + (I'd like PROFILE to interact cleanly with TRACE, since both + facilities use function encapsulation) but if you have a need + for profiling now, you can probably use it successfully with + the current CMU-CL-style interface. * Pathnames and *DEFAULT-DIRECTORY-DEFAULTS* are much more ANSI-compliant, thanks to various fixes and tests from Dan Barlow. Also, at Dan Barlow's suggestion, TRUENAME on a dangling symbolic @@ -775,12 +781,14 @@ changes in sbcl-0.6.13 relative to sbcl-0.6.12: * Some math functions have been fixed, and there are new optimizers for deriving the types of COERCE and ARRAY-ELEMENT-TYPE, thanks to Raymond Toy's work on CMU CL, ported by Martin Atzmueller. +* (There are also some new optimizers in contrib/*-extras.lisp. Those + aren't built into sbcl-0.6.13, but are a sneak preview of what's + likely to be built into sbcl-0.7.0.) * A bug in COPY-READTABLE was fixed. (Joao Cachopo's patch to CMU CL, ported to SBCL by Martin Atzmueller) * DESCRIBE now gives more information in some cases. (Pierre Mai's patch to CMU CL, ported to SBCL by Martin Atzmueller) -* The code in the SB-PROFILE package has been substantially - improved, although it's still unstable. +* Martin Atzmueller and Bill Newman fixed some bugs in INSPECT. * There's a new slam.sh hack to shorten the edit/compile/debug cycle for low-level changes to SBCL itself, and a new :SB-AFTER-XC-CORE target feature to control the generation of @@ -804,13 +812,134 @@ changes in sbcl-0.6.13 relative to sbcl-0.6.12: the byte fasl file version is now equal to the ordinary fasl file version. +changes in sbcl-0.7.0 relative to sbcl-0.6.13: +* incompatible change: The default fasl file extension has changed + to ".fasl", for all architectures. (No longer ".x86f" and ".axpf".) +* The EVAL-WHEN code has been rewritten to be ANSI-compliant, and + various related bugs (IR1-1, IR1-2, IR1-3, IR1-3a) have gone away. + Since the code is newer, there might still be some new bugs + (though not as many as before Martin Atzmueller's fixes:-). But + hopefully any remaining bugs will be simpler, less fundamental, + and more fixable then the bugs in the old IR1 interpreter code. +* The IR1 interpreter, byte compiler, and byte interpreter are gone. + It's long been my plan to remove the IR1 interpreter while making + EVAL-WHEN ANSI-compliant. It turned out that a cascade of changes + caused by EVAL-WHEN ANSIness would have required fairly simple + changes to the byte compiler; except they turned out to be quite + difficult. This, plus the new familiarity with the byte compiler + in general that I picked up as I worked on this specific problem, + reduced my opinion of its maintainability enough that I deleted it + instead of trying to fix it. +* The compiler, especially the IR1 phase of the compiler, has been + tweaked somewhat to support the new implementation of DEFUN and + of the static linking hack used for cold init. In particular, + the property of "is externally visible" is now orthogonal to + the property of "is optimized/specialized for being called + at LOAD time, with no arguments and no argument checking". + The old FUNCTIONAL-KIND=:TOP-LEVEL type code which + conflated these two properties has been replaced with the + FUNCTIONAL-HAS-EXTERNAL-REFERENCES-P flag. This has minor + beneficial consequences for the logic of #'CL:COMPILE and other + things. Like the rewrite of EVAL, it has also quite possibly + introduced some new bugs, but since the new logic is simpler and + more orthogonal, hopefully it will be easier to clean up bugs + in the new code than it was in the old code. +* The rewritten compiler is still a little unsteady on its feet. + In particular, the debugging information it produces is sometimes + broken, and the support for inlining FOO when you + (DECLAIM (INLINE FOO)) then do (DEFUN FOO ..) in a non-null + lexical environment has been temporarily weakened (because the + old clever code depended on correct debugging information). +* There are new compiler optimizations for various functions: FIND, + POSITION, FIND-IF, POSITION-IF, FILL, COERCE, TRUNCATE, FLOOR, and + CEILING. Mostly these should be transparent, but there's one + potentially-annoying problem (bug 117): when the compiler inline + expands the FIND/POSITION family of functions and does type + analysis on the result, it can find control paths which have + type mismatches, and when it can't prove that they're not taken, + it will issue WARNINGs about the type mismatches. It's not clear + how to make the compiler smart enough to fix this in general, but + a workaround is given in the entry for 117 in the BUGS file. +* (Because of the interaction between the two previous items -- + occasional inlining problems and new inline expansions -- the + new FIND, POSITION, FIND-IF, and POSITION-IF code won't really + kick in properly until debugging information is straightened out + in some future version.) +* DEFSTRUCT and DEFCLASS have been substantially updated to take + advantage of the new EVAL-WHEN stuff and to clean them up in + general, and they are now more ANSI-compliant in a number of + ways. Martin Atzmueller is responsible for a lot of this. +* A bug in LOOP operations on hash tables has been fixed, thanks + to a bug report and patch from Alexey Dejneka. +* PPRINT-LOGICAL-BLOCK now copies the *PRINT-LINES* value on entry + and uses that copy, rather than the current dynamic value, when + it's trying to decide whether to truncate output . Thus e.g. + (let ((*print-lines* 50)) + (pprint-logical-block (stream nil) + (dotimes (i 10) + (let ((*print-lines* 8)) + (print (aref possiblybigthings i) stream))))) + should truncate the logical block only at 50 lines, instead of + often truncating it at 8 lines. +* Martin Atzmueller fixed several other bugs: + ** correct ERROR type for various file operations + ** removing dead code +* Alexey Dejneka fixed many bugs: + ** misbehavior of WRITE-STRING/WRITE-LINE + ** LOOP over keys of a hash table, LOOP bugs 49b and 81 and 103, and + several other LOOP problems as well + ** DIRECTORY when similar filenames are present + ** DEFGENERIC with :METHOD options + ** bug 126, in (MAKE-STRING N :INITIAL-ELEMENT #\SPACE)) + ** bug in the optimization of ARRAY-ELEMENT-TYPE + He also pointed out some bogus old entries in BUGS, and fixed + a number of bugs which came into existence in the pre7 branch + (internal to the CVS repository), so that they never showed + up in release versions. +?? Old operator names in the style DEF-FOO are now deprecated in favor + of new corresponding names DEFINE-FOO, for consistency with the + naming convention used in the ANSI standard). This mostly affects + internal symbols, but a few external symbols like + SB-ALIEN:DEF-ALIEN-FUNCTION are also affected. +* :SB-CONSTRAIN-FLOAT-TYPE, :SB-PROPAGATE-FLOAT-TYPE, and + :SB-PROPAGATE-FUN-TYPE are no longer considered to be optional + features. Instead, the code that they used to control is always + built into the system. +?? The value of INTERNAL-TIME-UNITS-PER-SECOND has been increased + from 100 to 1000. +* The default value of *BYTES-CONSED-BETWEEN-GCS* has been + doubled, to 4 million. (If your application spends a lot of time + GCing and you have a lot of RAM, you might want to experiment with + increasing it even more.) +* minor incompatible change: DEFINE-ALIEN-FUNCTION (also known by + the old deprecated name DEF-ALIEN-FUNCTION) now does DECLAIM FTYPE + for the defined function, since declaiming return types involving + aliens is (1) annoyingly messy to do by hand and (2) vital + to efficient compilation of code which calls such functions (and + since people writing calls-to-C code aren't likely to be bothered + by implicit assumptions of static typing). +* The interpreter, EVAL, has been rewritten. Now it calls the + native compiler for the difficult cases, where it used to call + the old specialized IR1 interpreter code. +* The doc/cmucl/ directory, containing old CMU CL documentation + from the time of the fork, is no longer part of the base system. + SourceForge has shut down its anonymous FTP service, and with it + my original plan for distributing the old CMU CL documentation + there. For now, if you need these files you can download an old + SBCL source release and extract them from it. +* lots of other tidying up internally: renaming things so that names + are more systematic and consistent, converting C macros to inline + functions, systematizing indentation, making symbol packaging + more logical, and so forth +* The fasl file version number changed again, for about a dozen + reasons, some of which are apparent above. + planned incompatible changes in 0.7.x: * The debugger prompt sequence now goes "5]", "5[2]", "5[3]", etc. as you get deeper into recursive calls to the debugger command loop, instead of the old "5]", "5]]", "5]]]" sequence. (I was motivated to do this when squabbles between ILISP and SBCL left me very deeply nested in the debugger.) -* The fasl file extension may change, perhaps to ".fasl". * The default output representation for unprintable ASCII characters which, unlike e.g. #\Newline, don't have names defined in the ANSI Common Lisp standard, may change to their ASCII symbolic