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3/11/94 to 3/20/94

 -- Debugger Enhancement from Harris to not abort printing of a frame when
    printing one arg gets an error.
 -- In OUTPUT-INSTANCE, check for the layout being invalid before calling the
    print function, since the print function might error.
 -- Tweak read-line to work better on a non-persistent EOF (e.g. ^D on TTY)

 -- In byte compilation, don't call valid-function-use on mv-combinations.
    Don't annotate mv-calls to inline functions or slot accessors as though
    they were non-mv calls.

 -- In inst-lisp, allow separate specification of source and destination

 -- Deleted some setting of *hack-hunk-replace-line* to T, since we may want it
    explicitly disabled in the init file.

 -- Better handling of obsolete structure instances in generic function

2/15/94 to 3/11/94


Changed the default for library: under hpux to be /usr/local/lib/cmucl/lib.

Bind *break-on-signals* to NIL even before doing the type test so that we don't
wedge the error system if the type is malformed or undefined.


Changed return to return-from assert-definition-type.

Changed assert-definition-type to quietly ignore non function-types.

Allow stream arg to compile-file.

Deleted incorrect type declaration in process-1-ftype-proclamation.  Deleted
test for function-type-p around call to assert-definition-type, since this is
now folded into the function.  Previously several calls weren't doing this
necessary check.

NATIVE-COMPILE-COMPONENT) to ensure that cleanup code has block numbers.
Also added some MAYBE-MUMBLE calls for *COMPILE-PROGRESS*.


Patch from Harris.

Motif Interface:

Don't byte-compile if not :small.

Changed ~A to ~D when formatting socket file in case the base isn't 10.

Added some fflushes to motifd.

Add INVOKE-TTY-DEBUGGER.  Don't try to invoke motif debugger if we didn't
succeed in opening a connection.

Print warning in status hook when server dies.  Simplified boolen expression.

2/9/94 to 2/14/94

 -- Fixed %report-times to not choak if any of the function names are not
    symbols (e.g. setf functions).
 -- Don't warn about &rest consing if we can't figure out what the argument
    signature is, because we don't use &rest anymore.
 -- GET-INTERNAL-RUN-TIME now works under hpux, so go ahead and use it.  In
    cmucl, use &more instead of &rest to avoid consing the &rest arg list.

Small runtime (w/o compiler) hacks:
 -- Add dummy stubs for EVAL:INTERNAL-EVAL, etc. which signal errors when the
    IR1 interpreter hasn't been loaded. 
 -- Don't try to do verbose ROOM if it isn't loaded.
 -- Export EXT:PURIFY and remove the :CONSTANTS argument.
 -- Move environment compacting into PURIFY instead of doing it at top-level in
    worldload.  Now users can do it too.
 -- Allow pretty-printer to work without compiler loaded.

 -- Fixed TWO-ARG-GCD to correctly handle most-negative-fixnum.  Was choaking
    because someone declared (- most-negative-fixnum) to be a fixnum.
 -- Fixed the warning in defpackage about no longer using some packages to
    actually work.
 -- Fixed COERCE to use subtypep to analyze the output type spec instead of
    checking for magic symbols.
 -- Changed vector to inherit from array before generic-vector.  Fixed
    simple-string to list string in the inherits list.
 -- Add TTY-IXON mode for HPux.

 -- Changed coerce-to-smallest-eltype to call coerce with a vector type
    specifier instead of an array type specifier. (necessitated by "fix" to
 -- Tweak CONVERT-CALL-IF-POSSIBLE to not try to convert calls in top-level
    code which call code in another component (because we already failed to
    convert the call before.)
 -- In BYTE-COMPILING, always return T when :BYTE-COMPILE T was specified.
    This was causing byte-compiled PROGV to flame out.
 -- Add DELETE-IF-NO-ENTRIES to blow away components that can't be reached
    before we try to generate IR2.  This avoids some internal errors when
    unreachable local functions are deleted.

 -- Changed worldload.lisp to use :RUNTIME feature to suppress loading
    everything, and to use the new maybe-byte-load and byte-load-over
    functions to load lots of byte code when RUNTIME is present.
 -- In worldcom, when NO-RUNTIME feature is absent, compile various subsystems
    byte-coded as well as native coded so that we can choose at system build

 -- Move the new_compiler branch onto the trunk.
 -- In READ-BUFFER-FILE, set BUFFER-WRITABLE to T before doing anything so
    that we don't get spurious read-only errors.
 -- Move all font name defhvars to rompsite and give them the actual default
    as their initial value.  Change those defaults to be courier, flushing all
    mention of 8x13.
 -- Un-conditionalize TIOCSLTC ltchars hacks for HpUx, since they are needed
    to suppress dsusp.
 -- Turn off ^s/^q under tty for HPux with IXON off.  

    Call UPDATE-LISP-CLASS-LAYOUT instead of REGISTER-LAYOUT, since the bare
    R-L doesn't update the inherits from the CPL.  This caused LAYOUT-INHERITS
    to be left empty when a class was redefined.

 -- Added some extra protection against recursive invocation of the windowing
 -- Tried to make starting the Motif server more robust, or at least give some
    intelligible error message.

1/28/94 to 2/9/94

Changed step to set-step-breakpoint because step is supposed to be the
exported step macro, not some internal routine.

Default the name slot in defmacro-lambda-list-bind-errors to NIL.

Added an executable-only optional to unix-namestring so that we can expand
path:foo into the first executable in the path named foo, not just the
first file.

Changed run-program to only try to run executables, and to flame out if
it can't be found in path:.

Fixed defpackage to combine multiple use, export, and import options

Fixed coerce to call type-expand so that people can coerce to deftypes.

Changed the byte-function and byte-closure funcallable-instances to use
&more args instead of a &rest arg.

Changed main-entry to use etypecase instead of assuming that the arg is
always either a lambda or an optional dispatch, because sometimes raw
functionals get passed in.  This way we will get a better error message.

Give a sensible error message if we can't find the slave utility (e.g.
lisp) to run.

1/6/94 to 1/28/94


Re-frobbed fd-stream-read-n-bytes to preserve the property of returning less
than the requested number of bytes when eof-error-p is NIL and that is what
unix-read read.

Startup C code:

Use /usr/local/cmucl instead of /usr/misc/.cmucl on hpux.


Restored the behavior of scribe-file to cd to the directory of the .mss
file before running scribe.  This was accidentally removed in an attempt to
clean up some compiler warnings.

12/11/93 to 1/6/94

In read-n-bytes, only signal EOF when we read and got 0 bytes, not never read
returns less than we wanted.  Also, fix the case of small reads with an empty
buffer not to leave garbled buffer pointers if we have to do more than one
read.  These changes affect primarily people who read form pipes, like Xlib and

Added all of the ANSI CL features that seemed plausible, since we're closer to
ANSI CL than any other version of CL.  Any non-ANSI compliance is now a bug,
not a feature...

YES-OR-NO-P and Y-OR-N-P now force output.

Added a derive-type defoptimizer for log.

In propagate-local-call-args, don't do anything if there is an
optional-dispatch specified.  The last fixed entry point won't be referenced by
the XEP, so we can't count on that providing a T type input.  This caused bogus
argument types to be inferred in byte-compiled code.

In UNCONVERT-TAIL-CALLS, do ENSURE-BLOCK-START so that we can manipulate the
use list.  Fixes an assertion failure in the compiler.

Call local-call-analyze whenever there's new-functions.  This got lost
when component-reanalyze-functions was added.  Fixes an assertion failure in
the compiler, and may result in better optimization.

Fix LOAD-TN-CONFLICTS-IN-SC to work for multi-location SCs.  Moved bind-to-nil
of *LIVE-BLOCK* and *LIVE-VOP* into PACK-LOAD-TNS to better ensure the live-tns
are invalidated between two packings of the same block (e.g. for repacking.)
These problems showed up with the X86, but could possibly happen elsewhere.

Add some hacks to PCL for coercing lisp:class objects to pcl:class.

Export make-load-form-saving-slots, not make-load-form-dumping-slots.

12/2/93 to 12/11/93

The Hemlock commands "Typescript Slave Break", "Typescript Slave to Top
Level", and other things that send out-of-band data to slaves running on
the HP should now work.  [That is, the slave will now notice them.]

11/16/93 to 12/2/93


Fixed arg ordering for getf in MAKE-CONDITION.

Picked up Miles' changes to apropos and apropos-list that allows one to
supply NIL for the package, meaning all packages.

Declare hi::%set-variable-value to be a function so that we don't get undefined
warnings on loading into a non-hemlock lisp.


[Sparc] Fixed %more-arg-values to return the count instead of always
returning 0.

Increase *inline-expansion-limit* from 50 to 200.

Change "inline expansion count exceeded" warning to be a note.

Don't inline expand when *converting-for-interpreter*.

when testing reals.  Added a define-type-predicate for REAL, so SOURCE-


Changed to make the release arg to inst-lisp useful.


Changed from using sed to ul in the "Manual Entry" command, since
this works better on HP, etc.

Changed rcsci and rcsco to ci and co, which now work at CS, and
also work in the rest of the world.

Motif Stuff:

Added an optional STYLE arg to the graphical inspector to make the
function consistent with its doc string (as well as the old inspector).

C Start-up Code:

Compile -O

Don't pass CFLAGS to the linker, since this may clash with the

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9/14/93 to 11/16/93

Added breakpoint support and inverse hyperbolic trig functions for the HP.

In the debugger, don't flame out on more-args, 'cause they exist now.

In describe, fresh-line before calling describe-object method.

Generalized condition effective slot computation so that we can find slots with
non-constant defaults and special-case them at MAKE-CONDITION time.

Fixed format-time to deal with daylight savings time better.  [i.e.
actually use EDT instead of EST in the summer.]

Fix SXMASH util for SXHASH to not be stupid.

Fixed COUNT :TEST-NOT to actually negate the test.

Flushed #+CLX in serve-event again (somehow reinserted during branchmerge),
since we may load CLX even if it isn't loaded at compile time.

Fixed decode-universal-time to correctly get the timezone info.  Rewrote
encode-universal-time to be sane and to correctly deal with timezones.
Well, at least they are closer to dealing correctly with timezones.

#-hpux'ed utimes, getreuid, and getregid 'cause HPUX doesn't have them.

Fixed decoded-time routines to allow timezones of (rational -24 24) instead
of (rational 0 (24)), 'cause negative timezones occur east of GMT.

9/13/93 to 9/14/93


Fixed a bug in byte compiling in-core dylan code.  (This happened when you
use the ``Compile Defun'' Hemlock command.)

Changed %more-arg-values (one of the companions of &more) to take a count
of values to skip, so people don't have to do gross things like assume the
context pointer is really a fixnum.


Update FUN-DEFINED-FROM-PATHNAME to understand byte functions.

9/2/93 to 9/13/93

Added support for &more, a &rest replacement that just gives you a pointer
to the args on the stack and a count instead of consing up a list.  This
should only be used by those up are in the know, as there are some tricky
issues involved.

8/23/93 to 9/2/93


8/16/93 to 8/23/93

Note: you need to recompile everything, because the debug-info structure
has changed.


Moved lots of stuff around so that more stuff can be byte compiled.

Fix from Mike Clarkson.  In the alien type= method for function, call
ALIEN-TYPE-= instead of calling ALIEN-TYPE-P with two args.

Add :CALLERS option to PROFILE which counts the most common callers 
of each profiled function, and reduced the number of recompiled profile

Added a ``DIRECT-SUPERCLASSES'' slot to CLASS so that Dylan can use it.

Added support for describing byte-compiled functions.

Add support for :EXECUTE keyword to EVAL-WHEN

Bulletproof output-instance a bit.


Fixed semantics of various type-classes (CL arrays, numbers, functions &
alien-types) that have superclasses.  This was especially problematic with the
Dylan collection heterarchy, but some problems could arise with 
e.g. (subtypep `(member ,#'cons) '(function (t t) cons)) (not technically legal
in CL, but used by the compiler on legal programs.)


Added direct support for Dylan module-variables.

Recognize the new :keyword EVAL-WHEN keywords.

Also allow the %coerce-to-function efficiency note in byte code.

Enable funcall -> %funcall IR1 transform for byte compilation.

Increment warning count after re-signalling so that we don't double-count
undefined warnings (where the default handler can be multiply instantiated.)

Don't load meta-vmdef and assemfile into the core.  Instead, load them
before we go to compile the compiler.

Flushed call to count-vops (static statistics), since it doesn't work anymore,
and isn't loaded.

[HP only]  Fixed the arg types on generic-eql-c/fixnum to restrict the
constant to 9 bits, not 14, because we can only fit 11 bits in the
compare-immediate instruction, and 2 are needed for the fixnum lowtag.

Changed the stream arg to DISASSEMBLY to be a keyword arg, since it's
non-standard, we can avoid option & keyword lossage.

Fixed the byte-compiler to correctly handle arguments to local functions
that have been deleted.


Flush carefully-add-font-path call.  If people want library:fonts/ in their
font-path, they can put it there.


Changed structure-type-p to recognize funcallable structures too.

Patch for getting slots of structure classes from Simon Leinen.

Add hack to :METACLASS option so that we use the pcl:: (standard object)
metaclass, and not the lisp: (structure object) class when we see

Changed SPECIALIZER-FROM-TYPE to extract the specializer from LISP:CLASS

Fix to CONVERT-TO-SYSTEM-TYPE from Harris.

Byte-compile defclass, defcombin, env, and iterate if :SMALL.


Make OLD-PCL and OLD-SLOT-ACCESSOR-NAME be nicknames during loading.


Supply missing :INITIAL-ELEMENT NIL in MAKE-ARRAY call.

New definition of NO-SLOT from Harris.

Startup Code:

Don't reference the various random symbols inside a static data structure,
because the SunOS compiler is ``smart'' enough to remove it because it
isn't referenced.

CLM/Motif stuff:

The server process will now call wait to clean up zombie children
when running under Mach.  There will be at most one <defunct> process
at any given time.

Shadow CLASS-DIRECT-SUPERCLASSES because both kernel and pcl want to export
it and we want to use them both.

8/4/93 to 8/16/93

Bug fixes:
 -- Fixed namestring of a stream to not flame out if there is no pathname for
    that stream.
 -- Fixed DO-SYMBOLS to iterate over the package-use-list instead of the
    package-tables, because package-tables gets reordered.

Also, various miscellaneous tuning changes indicated by dynamic profiling of
the compiler.  Some only speed the compiler, but some optimizations are more
general (new sequence transforms.)  In particular, 
transform member, delete and assoc to memq, assq and delq when possible.
Inline expand vector & list POSITION, vector FILL and list DELETE-IF.

Instead of using symbolic links for motifd and site-init, copy them into the
release area.  This prevents problems with the release area being broken when
things are changed in the build area.

7/22/93 to 8/4/93

Bug fixes:
 -- Fix default-structure-print to just call the accessor (so that it handles
    raw slots.)
 -- Pad double-float slot offsets w.r.t. DD-RAW-LENGTH, not DD-LENGTH.
 -- Changed %COMPILER-ONLY-DEFSTRUCT to be magically called by IR1tran, since
    eval-when doesn't do the right thing if nested in an another eval-when.
 -- fixed pprint-do to not flame out if one of the binding lists is NIL.
 -- (numeric-contagion single-float real) => float, not single-float
 -- Actually pass the byte-p argument to open-fasl-file so that it really does
    use the machine-independent byte-code fasl file implementation.

 -- Logical pathname changes.  Pattern-matching on :WILD-INFERIORS is now
    implemented, but the Unix code treats it pretty much like :WILD.  Detect
    more error cases in TRANSLATE-PATHNAME.  Fixed some type declarations that
    didn't allow :UNSPECIFIC or :WILD when they should.  :WILD now appears in
    pattern always being used.
 -- If the argument to COMPILE-FILE is already absolute, then dump it in the
    debug-info as the source file, instead of always using the truename.  This
    allows search-lists or logical pathnames to be preserved in the
    defined-from info.
 -- PATHNAME of a FD-STREAM now returns the original, unresolved pathname.
    This preserves search-lists and logical pathnames.
 -- Motif: Add Herald display item.  Add :MOTIF feature.
    Now clmcom loads PCL if not already loaded, so it should work in a
    compiler-only core.

 -- Fix initialization of print-representation attribute so that characters
    >127 don't cause text to mysteriously disappear.
 -- Added hpux support in setup-input and reset-input.
 -- Fixed "can't edit source" message not to throw you in the debugger when
    invoked from the command line.

7/4/93 to 7/22/93

The largest changes are:
 -- PCL port revamped to re-integrate PCL classes with the type system and to
    more efficiently dispatch on structure and built-in types.  Some
    miscellaneous tuning.  CLOS symbols are now exported from the LISP package,
    so you don't need to USE-PACKAGE PCL anymore.
 -- New version of CLX: R5.01

PCL notes:

This PCL fixes a number of problems that were introduced in the changeover to
the new structure format:
 -- The Lisp type system is now integrated with PCL (even better than before.)
 -- Structure-class slot-value now works again.

Generic function dispatch should be significantly more efficient in this PCL,
especially for built-in and structure classes.  There should also be reduced
run-time compilation (e.g. in the Motif inspector) due to less use of
non-precompiled dispatch functions.  TYPEP for PCL objects should be
faster, and type system integration should be fairly complete.  CLOS class
names are recognized as "real" types by the compiler, not SATISFIES DEFTYPES.
Note that LISP:CLASS is still not a PCL class, so PCL needs to shadow CLASS

Misc enhancements:
 -- Build motif interface as a "library" file for easier distribution.
 -- Added stuff to allow compile-file and compile-from-stream to be used to
    compile dylan code.  (Assuming you have the dylan to common-lisp converter
 -- Tweeks to allow for compiling/evaling dylan code in a slave.
 -- Make compiler error functions use the condition system.  This ANSI cleanup
    has two advantages:
     1] compiler-warning and warn are now equivalent, so uses of WARN will be
	counted in the warning total and given source context.
     2] user handlers can be defined to notice or suppress output.

Misc bug-fixes:    
 -- Do a BOUNDP check so that references to undefined types inside of a
    WITH-COMPILATION-UNIT but outside of the compiler won't cause
    undefined-variable errors.
 -- Set up a default for modules: search-list.
 -- [sparc,mips] Fixed a bug in default-unknown-values where it wouldn't
    default the first unsupplied value to nil if more then 6 values where
 -- Structure slot accessors are no longer constant-folded, because that was 
    causing problems with some make-load-form hacks.
 -- Changed BACKQ-UNPARSE to check for improper lists instead of getting an
    internal error.  Some meaningless backq forms will now pprint as "###
    illegal dotted backquote form ###".
 -- Added explicit error checking to the debugger so that we don't get an
    internal error (bus error in unsafe code, etc.) when attempting to display
    source from a file that has been excessively modified.
 -- Tweaked compilation of an incompatible defstruct definition to compare to
    the previously compiled layout, rather than the current run-time
 -- Added SIMPLE-STYLE-WARNING, and spiffed up the simple-condition hacks so
    that (typep x 'simple-condition) works.
 -- Bind *BREAK-ON-SIGNALS* to NIL when we call BREAK in SIGNAL so that the
    debugger doesn't recurse on itself.
 -- In LOAD-FOREIGN, use unix-namestring on each file before passing it to the
    linker to get rid of search lists.
 -- Fixed a few bugs in DELETE-PACKAGE, and gratuitously rewrote it.  Inline
    the call to MEMBER in DO-SYMBOLS so that we don't waste quite so much time
    dealing with shadowing symbols.
 -- Fix compiler-error proxy to not always say FORM as the error form.

Class stuff:
 -- Made CLASS-TYPEP no longer an interface.  Block compiled TYPEP.
 -- Add DIRECT-SUPERCLASSES slot to BUILT-IN-CLASS and initialize it.
    forward references to redefinable or undefined classes.  INFO TYPE CLASS is
    now a CLASS-CELL or NIL, and the class is actually in the CLASS-CELL-CLASS.
 -- Added some missing elements in the class-precedence lists of float and
 -- Add stuff to initialize the layout hash.
 -- Add standard-class and random-pcl-class for representing objects whose
    real class is a PCL class.  Add class-pcl-class slot for tracking the PCL
    class of any class.  
 -- Changed layout invalidating to set to :INVALID, not T, since PCL uses T
    to mean valid. 
 -- Add transform for constant FIND-CLASS & change class TYPEP to 
    use the CLASS-CELL make-load-form instead of LOAD-TIME-VALUE.
6/10/93 to 7/4/93

simple-condition-format-string -> simple-condition-format-control
This provides a way to say that restarts are relevant only to a certain
Added style-warning and parse-error conditions.
Added report method for end-of-file.  Exported cell-error-name.
Flushed storage-exhausted and stack-overflow conditions.

Don't export hash-table-weak-p from the common-lisp package.
Added PRINT-NOT-READABLE condition and made people use it.
Renamed get-setf-method-multiple-value to get-setf-expansion and
Export COMPILER-MACRO documentation kind.
Changed EOF-OR-LOSE to signal the END-OF-FILE condition.
special-form-p -> special-operator-p

define-setf-method to define-setf-expander.  The old names are also defined for
Made DYNAMIC-EXTENT declaration recognized & ignored.
Nuked compiler-macroexpand[-1] because they didn't make it into the standard.
Added degenerate versions of stream-external-format, file-string-length and the
    :external-format argument to open.
Changed two-arg-= to use = instead of using eql so that (zerop -0.0) -> t

[mips] Lots of tweeks in order to use NIL and 0 directly from the registers
holding them instead of copying them into a new register and then using it.

[mips] Changed generic-= and generic-/= to not assume that EQ implies =,
because it doesn't in the case of NaNs.

6/1/93 to 6/10/93

Fixed clear-input on file descriptor streams to flush any unread chars.

Few more minor inspector/describer fixes.

Added checking for division by zero on the sparc.

Fixed pcl::print-random-thing to flame out if *print-readably* is true.

5/25/93 to 5/31/93

Support for funcallable instances in describe and tty-inspect.

Fix byte interpreter so that the fix to make Hemlock/MH work actually takes

In Hemlock delete-breakpoints-buffer-hook, if no wire (server died), then don't
do anything.

5/20/93 to 5/25/93


Fixed function-debug-function to work on closures.

When we tail-call native code from byte code for multiple values, we must
un-negate the return PC.

Now that +0.0 and -0.0 are no longer eql, fixed atan to deal with them

Added weak hash-table support.


Fixed the handling of +/- 0.0:
 - = is no longer converted to EQL, but is directly handled by the backend.
 - EQL is converted into a raw comparison of the bits.

Added LOAD-TIME-VALUE support to the byte-compiler.

5/4/93 to 5/20/93

The largest number of changes are related to the use of byte-compilation for
space reduction and the debugging of byte-compilation so that this works.
Together with assembly optimization, this has reduced the size of the full MIPS
core by 26% and the full sparc core by 14%.

Byte compilation overview:

The decision to byte-compile or native compile can be done on a per-file or
per-code-object basis.  COMPILE-FILE now has a :BYTE-COMPILE argument.  If T,
we byte-compile everything and create a machine-independent fasl file
(dependent only on byte order, file type "bytef" or "lbytef".)
If :MAYBE (the default, from EXT:*BYTE-COMPILE-DEFAULT*), things are
byte-compiled when speed = 0 and debug <= 1.  Top-level forms are byte-compiled
by default (controlled by ext:*byte-compile-top-level*.)  

Byte compilation is roughly twice as fast native compilation.  Byte compiled
code runs 50x--200x slower than native code, and is 6x more dense.  This is
about 10x faster than the IR1 interpreter, which is itself considered fast in
comparison to other Common Lisp interpreters.  Historical perspective: this is
about as fast as Spice Lisp on a PERQ.

Bug fixes:
 -- Fixed atan to handle zeros better.  It still isn't right because the
    compiler thinks that +0.0d0 and -0.0d0 are similar as a constant. [William
    has a fix not yet checked in.]
 -- Fixed PCL not to clobber define-compiler-macro with a NO-OP.
 -- Changed save to pad the core file out to CORE_PAGESIZE bytes, so that when
    we mmap it back it, we won't get bus errors if the real page size is less
    then the CORE_PAGESIZE.
 -- Use ~C instead of ~A when printing float exponent marker so that
    print-readable doesn't mess things up.
 -- Really really fixed get-setf-method-multiple-value for local macros.  Also,
    in the recursive calls, people were not propagating the environment
    through, and in some places were not recursing with the multiple-value
 -- Added FLOAT-RATIO for precise ratio floating (as need by the float reader.)
    This avoids roundoff error by doing an integer division.

Gratuitous changes:
 -- Don't load code/inspect if we are loading clm.
 -- Removed (setf weak-pointer-value) and made make-weak-pointer itself the
    compiler primitive in order to simplify the gengc port.
 -- Protect vm:code-breakdown against the debug-source being missing
    (shouldn't happen but does if compilation is interrupted or something) and
    against random values being in the debug-info slot (byte compiled code.)
 -- Added stuff to fake scavenger hooks in the non-gengc system.
 -- Changed pathname code not to use %primitive to make/access/set value-cells.
 -- Fixed string and simple-string to include generic-string and vector in
    their inherits lists.  Fixed built-in class creation stuff to use -1 for
    the inheritance depth if any of the supertypes have -1 for the inheritance

 -- Use an auxiliary function to make the condition for macro arg count
    errors to save space in macro definitions.
 -- Byte compile the expander functions for all macros except those in code/
    (those may come later.) 
 -- Compile PCL's guts unsafe when #+SMALL.
 -- Byte-compile most Hemlock commands.
 -- Some gratuitous RANDOM tuning.  Random double floats are now much, much
    faster. Added transforms for RANDOM to type-specific functions (which can
    then be inline-expanded).


    Assembly optimization is now enabled, giving large speed/space improvements
    on MIPS and some on SPARC.  This optimization is done when speed >
    compilation-speed (i.e. not by default) since it significantly slows

Bug fixes:
 -- When iterating over the lamdba-calls in unconverting tail calls, have
    to ignore any deleted lambda.
 -- [mips] removed immediate lognor stuff, because the nor inst can't handle
 -- [mips] Added :cost 0 to instructions that were 0 but were defaulting to 1
    (for profiler.)
 -- Fixed instruction scheduler to correctly deal with having a load-word
    in a branch delay slot. 
 -- Fixed assembler cost incrementer to work with the new block numbering (for
 -- When computing block numbering for debug info/profiling, don't increment
    until after all references on that iteration...

Added a symbol-hash slot to symbols under the gengc system.  When symbols
are created, this is filled in with a random value.  Things that want a
fast hashing of symbols but don't want to depend on the address can use
this value.

Byte compilation:
 -- If debug-info for a code object is a string, print it (for byte code)
    instead of assuming it is a debug-info.
 -- Changed byte-function loading to use funcallable instances.
    Added support for loading machine-independent fasl files.  Made
    *load-print* do its thing for byte functions.
 -- Byte interpreter fixes:
      -- Fixed stack-copy to deal with overlapping upward copies.
      -- Fixed some index &stack-pointer declarations for indices that could be
         negative to be FIXNUM. 
      -- Added a comment explaining what the keyword parsing code is
         doing.  Fixed exit test on the keyword parsing loop.
      -- Made current-stack-pointer a macro so that we won't blow out the
         inline expansion limit.
      -- Fixed byte-apply to compute the arglist in forward order when nargs
      -- Fixed to potentially grow the eval stack when allocating a frame.
 -- Byte interpreter enhancements:
      -- Add system-constants support for fdefinition objects.
      -- Call different :interpreter-function for inline op if specified.  
      -- Define safe %byte-symbol-value, %byte-car and %byte-cdr operations.
      -- Add two-arg-stringXXX stubs.
      -- Moved definition of *eval-stack* here so that we can use byte code w/o
         the IR1 interpreter (and compiler) loaded.
      -- Changed byte functions to be funcallable instances.  This gives them a
         recognizable type and allows them to print nicely.
      -- Moved definitions of byte-functions (formerly byte-xep) here from 
         byte-comp so that we can use them w/o the compiler loaded.  Changed
         byte-functions to have simple and hairy subtypes to save space for the
         common fixed-arg case.  Added a name slot for debugging.

 -- Byte compiler fixes:
      -- In PROGV ir1 convert, also use %PROGV for byte compiled code.
      -- If any top-level vars are closed over, and *byte-compile* is :maybe,
         then choose native compilation for everything.  This ensures that we
         won't reference a native closure in a byte-compiled top-level form, or
      -- Have to clear the constant info between compiling each byte-component
      -- Fixed various problems with fasl-dumping byte code: 
         Eliminated some redundant stack/table checking operations.  Have to
         add in vm:code-constants-offset when computing byte-component entry
         and XEP patch offsets.  Bind *unparse-function-type-simplify* to T
         when getting the type specifier for :type-predicate fixups, since we
         don't want to check against complex function type specs.
      -- Actually compute the NUM-MORE-ARGS slot in functions with more args.
      -- don't add uninteresting BLOCK continuations to the consumes.
      -- At NLX EP, annotate the stack as empty (ignoring any stuff pushed
         earlier in the ENTRY block), since they aren't going to be live; UWP
         NLX EPs are only called when we unwind, and then restoring the stack
         is someone else's problem.
      -- Need to annotate the mv-bind continuation as fixed-values.  Also, when
	 doing a multiple call for fixed values, must tell canonicalize-values
	 that there are unknown values on the stack.
      -- Removed byte-output-length.  Instead we explicitly finalize
         the segment so that we have the correct offsets for the entry labels.
      -- When annotating tail-local calls, make sure the successor is the
      -- Fixed byte-continuation numbering to be global and to be done for all
         the continuations referenced in ssets.
      -- Subtract out the right set in stack flow analysis.
      -- When moving set args into locals, remember that we number args
      -- If block ends in a tail call, don't emit any jump.

 -- Byte compiler enhancements:
      -- When byte-compiling, don't do any inline expansion, and suppress many
	 transforms.  This speeds up byte code as well as saving space.
      -- Allow fdefinition system constants.  Add some popular functions to
         system constants.
	 support type-checking inline ops.  Put inline funs in a hashtable.  
      -- Add %negate/fixnum, </fixnum, >/fixnum, safe-car, safe-cdr,
         length/list, cons, two-arg list and three-arg list*.
      -- Add byte-code specific IR1 transforms for EQL/FIXNUM and CHAR=.
      -- Add two-arg string=, string>, string<.  Flushed use of
      -- Moved byte disassembler here from byte-interp.  Enhanced disassembler
	 so that it can dump disassembly in trace file.
      -- Add pseudo-backend operations which use the byte-order to determine
	 what machine-independent fasl format to use. 

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4/4/93 to 5/4/93

Initial cut at making PCL work again w/ the new class support.  We just
shadow find-class, etc.

Motif interface and inspector back, and have been fixed to work with the new
structure format.  Some past changes in the inspector/debugger sources will now
be visible: see below.

Changed core saving to no longer save the stacks.  Instead, when the core is
restored, a (supplied) initial function is invoked which can do whatever kind
of setup it wants.  This makes a saved lisp totally independent of the location
of the C stack. [fixing the sun4m sunos problem] Save-lisp must now be called
with an init function, and after it finishes, it terminates the saving lisp
process, instead of returning.  In addition to the change in the save-lisp
interface, the main user-visible difference is that there are fewer junk frames
on the stack in saved cores.

Added the built-in-class REAL.
Added the read-only collection built-in-classes needed by dylan.

 -- Don't do assumed function stuff if we have a :NOTINLINE function.  This
    was breaking an assertion.
 -- Changed FIN-FUNCTION special form to be a new kind of LAMBDA so that we
    can COMPILE them.
 -- Moved def-source-context for DEFMETHOD to PCL sources.
 -- [MIPS only] Fixed unbind-to-here to not dereference past the end of the
    binding stack.


The debugger will now reuse old debugging panes rather than creating
new ones all the time.  In addition, the stack backtrace is no longer
displayed by default.

Replaced uses of Motif gadgets with corresponding widgets.  This
also fixes the problem with warnings about 'alignment' not being
a valid resource.

Invoking LISP-CONTROL-PANEL from the TTY now works correctly and
QUIT will kill off any Motif servers that you have started.
The "Edit Source" button now works.
A new button, "Dump Backtrace" has been added.  This is for dumping
a copy of the stack backtrace for use in bug reports.  At the moment,
it just prints a copy of the backtrace on the standard output stream.

Added support for deleting all active inspection panes.
Added comments and descriptions on how to implement inspector
display methods for view customization.

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4/3/93 to 4/4/93

Added serveral new classes needed to bootstrap dylan.  There should be no
user visable changes, except that you might have to recompile stuff if
something depends on the superclasses of sequence.  The loader will tell
you if so.

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3/15/93 to 4/3/93  [no PCL or CLM]


don't choke on values types in the functional position.

Fixed FREEZE-TYPE to seal all subclasses.

Profile.lisp updated for new assembler and block-compiler ir1opt.

Fixed sparc GET-TYPE vop.


Fixed ptrans_instance to actually return the result of calling ptrans_boxed
instead of relying on the result still being in the correct register.

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3/1/93 to 3/15/93 [PMAX only, no PCL]

New & improved support for funcallable instances so that we can easily define
generic function classes for Dylan & CLOS.  Also, fixed some bugs in the new
structure type stuff:
 -- Redefinition failing or resulting in spurious errors, #<foo> is not a FOO
    errors, etc.
 -- Fixed BOA constructors to ignore package when determining if a slot appears
    as an arg.
 -- Fixed CIRCLE-SUBST to not bother looking down the instance-layout slot so
    that splicing structures into the read input doesn't result in CIRCLE-SUBST
    searching though the entire type system for places to fix up #n#'s.

Fixed a bug introduced by tuning (was breaking TTY redisplay):
 -- Fixed type decls in FILE-POSITION to allow :START and :END for positions.

Misc bug fixes:
 -- Fixed FORMAT-EXP-AUX to correctly handle variable width fields when the
    argument is negative.
 -- Fixed info-hash to work again on weird (not SETF) lists.

Misc enhancements:
 -- Improved usefulness of VM:CODE-BREAKDOWN :HOW :FILE by subdividing the
    files by package.
 -- Most of the support for Sean's block-counting profiler is in this core,
    but it's not all there yet. 

 -- Fixed a bug in type inference which seems to have generally prevented
    anything from being inferred about function result types of user-defined
 -- CTYPE-OF now extracts the function type from function objects, rather than
    just returning FUNCTION.
 -- Added FUNCTIONAL-PLIST slot for adding random annotations to functions
    within the compiler (such as this function is destined to be a funcallable
 -- Improved type predicate compilation for sealed classes in general (not just
    structure classes.)

2/27/93 to 3/1/93 [PMAX only, no PCL]

Fixed load to not always consider files with NIL type to be source files.  If
the file exists as specified, then look at the header instead of trying to
default the type.  If :CONTENTS is specified, then don't try defaulting types.

Replaced ISQRT with the fast version discussed on the net many moons ago.

Removed ROOM's load-time dependence on the compiler.  Add
isn't being GC'd.

Fixed type system to recognize the codes for internal BUILT-IN-CLASSes such as
CODE-COMPONENT.  Ripped out NS-BOOT conditionals.

Load the byte compiler and interpreter.  They don't really work yet, but will
be easier to debug if they're in the core.

The compiler now has an event counter for compiling a MAKE-VALUE-CELL op.

Reduced the size of static space (and the total core) by 1meg by clobbering the
hash-table vectors of the obsolete VOLATILE-INFO-ENVs in worldload.lisp.  For
some reason (probably residual stack or register pointers), the
VOLATILE-INFO-ENV doesn't get reclaimed by purify.  This meant that much static
space was being wasted by the unused SIMPLE-VECTORs and alists, even though the
compact version was the one actually being referenced.  This was exacerbated by
the change to multiple purifies, but has always been present in the
new-compiler systems.  Also, the Hemlock/CLX info environment wasn't being
compacted before the purify at all.

2/9/93 to 2/26/93 [PMAX only, no PCL]

New structure format and class support in the type system.  Some I/O tuning.
New fasl file format (you must recompile.)  This core does not contain PCL or
the GUI (which depends on PCL.)  The old core and startup code are in
    /afs/cs/project/clisp-3/alphas/olisp.core, olisp.

Structures & classes:

ANSI changes:
 -- Default defstruct keyword constructors can no longer reference argument
    values in slot init forms.  BOA constructors can still do this, so defining
    a BOA constructor with all keyword args will have the old effect.
 -- Class objects are now implemented, see FIND-CLASS, CLASS-NAME, TYPEP,
    CLASS-OF.  TYPE-OF is now based on CLASS-OF, and returns slightly different
    results than before.
 -- STRUCTURE-CLASSes now exist.  See also the STRUCTURE-OBJECT type.
 -- BUILT-IN-CLASSes also exist.  In some cases CLASS-OF (legally) returns
    non-standard subclasses of the standard class, e.g. for a float vector, the
    now DEFTYPEs.

Bug fix:
 -- Typed structures now have the correct (though rather odd) semantics of
    :offset and :named when inclusion is done.

Raw slots:
 -- Structure slots of subtypes of SINGLE-FLOAT, DOUBLE-FLOAT and
    (UNSIGNED-BYTE 32) are now allocated in non-descriptor storage, and can be
    read/written without number-consing overhead.

Type tests:
 -- The default (non-frozen) structure type predicate is now significantly more
    faster (no function call) in the case where the argument is a structure
    of another type or the type is a supertype of the object's type.  The code
    is also somewhat smaller.

 -- Handing of structure redefinition is now much more comprehensive.
 -- Definitions are only considered incompatible when slots have moved or been
    added, slot types are changed to a type that is not a subtype of the old
    type, or the inheritance structure has changed.  Previously any change at
    all would produce a warning.
 -- When a change is compatible, the default restart (CONTINUE) invalidates old
    instances, constructors and predicate uses.  When speed <= safety, a
    LAYOUT-INVALID error will be signalled when obsolete instances are passed
    to a type test (e.g. for type checking.)  Use of old code on new instances
    or old instances when speed > safety > 0 will result in type errors.
    Other restarts allow you to ignore the redefinition or to clobber the
    existing information, preserving the old code (in case the change is really
 -- If the structure length or inheritance structure has changed, an error
    is signalled when you load code that was compiled with a different
    structure definition than the one currently in effect.

 -- VM:STRUCTURE-USAGE renamed to VM:INSTANCE-USAGE.  Internally, the structure
    type and accessors have also been renamed, e.g. 
 -- The non-standard STRUCTURE type has become has become EXT:INSTANCE.  To
    (portably) test whether something is really a structure object, do 

Misc changes:

ANSI changes:
 -- #S readed no longer forces keywords into the keyword package. (ANSI)
 -- Added OPEN-STREAM-P.


Stream internals:
 -- Deleted read-line methods.  For simplicity, this rather unimportant
    operation is now implemented using read-char.
 -- READ-N-BYTES eof-error-p nil is now mostly non-blocking (it only reads what
    is in the buffer, or what unix-read returns if the buffer is empty.)  To be
    sure it won't block, you must guard it with a LISTEN.

Misc bug-fixes:

 -- Weaken (not (component-new-functions component)) assertion to allow
    deleted functions.
 -- Fixed LET* to correctly use the internal policy (not the interface policy)
    for all bindings, not just the first.
 -- Fixed a problem with functions losing their type declaration info when
    there is an inline expansion available.
 -- In local call VOPs, must load CALLEE-NFP with MAYBE-LOAD-STACK-TN, since it
    might not be in a register. [mips]

 -- Changed HANDLE-BREAKPOINT to allow breakpoints that nobody wants.  This
    can happen if a function-end breakpoint was deactivated while the function
    was on the stack, because there is no way to convert the bogus-lra back
    into the real lra.

 -- Fixed a type error in DEFPACKAGE's detection of defining a package which is
    really a nickname.  Improved handling of deleted packages (most operations
    signal an error.)


 -- Added declarations from efficiency notes in load, package, reader, char and
 -- Revived the support for FAST-READ-CHAR and the STREAM-IN-BUFFER, which
    allows READ-CHAR and READ-BYTE to be done with 0 function calls rather than
 -- Because of above two changes, both the reader and the fasloader are now
    significantly faster (reader 2x.)
 -- Default (non-frozen) structure type tests are now significantly faster (no
    function calls), and somewhat smaller.  This and the reader improvement
    have sped up the compiler somewhat.
 -- Many debug-info and compiler data structures are now annotated as pure,
    alloing them to be put in read-only space.  This reduces the amound of
    stuff in static space, speeding GC.
 -- Real-valued hash-table parameters (rehash-threshold etc.) are
    canonicalized to single-floats. 
 -- serve-event now uses UNIX-FAST-SELECT, so it can can handle >32 file
    descriptors and is more efficient.
 -- Changed UNIX-FAST-SELECT to a macro so that it can be efficient.  Changed 
    FD-SET stuff to be efficiently compilable.

2/4/93 to 2/9/93:
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Moved foreign-segment-{start,size} from mumble-os.lisp into foreign.lisp,
and changed it on the sparc to no longer conflict with read-only space.

Changed software-version to use /usr/bin/uname instead of stringing the
kernel.  [SunOS only]

Don't try the (SETF (APPLY ...)) hack for functions with non-fixed args, since
it doesn't do anything useful (just converts to a call to the (SETF FUNCTION).


Fixed listify-rest-arg.  It was leaving a tagged pointer to unallocated
memory in a descriptor register, which would confuse the garbage collector
if this value was still around.

Added all the info for the scheduler to the instruction files.

Redefined li on the sparc with define-instruction-macro.  This allows the
schedular to do a better job because the li gets broken up into the
seperate component instructions earlier.

Fixed make-array-header on the pmax to not seg fault.

Fixed the call to note-assembler-routine on the pmax.  This was breaking

Changed more occurrences of function-header-code-offset to
function-code-offset.  (should have them all by now...)


Changed definition of *subtypep to speed up method definition
using code provided by Richard Harris.

Updated definition of *pcl-system-date* as recommended by Richard Harris.

Changed the definition of force-cache-flushes by removing unnecessary
call to update-constructors, as suggested by Richard Harris.

HP support:

Fixed the stuff to emulate the ``addit imm,ALLOC,ALLOC'' instruction at the
end of pseudo-atomic to use all 11 bits of the immediate field instead of
just 5.

Graphical Interface:

The inspector/debugger was not behaving properly in the absence of
the DISPLAY environment variable.  It now correctly senses the lack
of X and quietly uses the TTY.

2/2/93 to 2/4/93:
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Fixed VALIDATE-CALL-TYPE to correctly handle calls where there is no
function type guarding the call (for example, calls to lambdas).  In this
case, we still want to call RECOGNIZE-KNOWN-CALL, since it will figure
out what leaf we are referencing, and might also do something else
interesting: inline expansion, etc.

Replaced the FORMAT transform with one that uses FORMATTER for more
complete handling of format directives.

Fixed make-array-header to not seg fault.

Changed more references to function-header-code-offset to

Motif Stuff:

Fixed things up so that the StringTable.h file gets written out
properly with all the other header files.

The debugger should now notice the absence of the Motif server and
print an error message to that effect.

1/13/93 to 2/2/93:


Fixed COMPUTE-CALLING-FRAME to not try using %CODE-DEBUG-INFO on things
that arn't code components.  This broke backtracing in the debugger.

Don't deftype POSITION, because it is a CL symbol.


Changed internal error signaling vops to be :translates instead of being
accessed via %primitive.

Fixed a problem with ASSERT-DEFINITION-TYPE when we have a keyword arg with a
non-constant default.

Added (values) to the end of %verify-argument-count so it matched the

Changed the defknown for %verify-argument-count to be more precise.

Chagned make-xep-lambda to declare the number of supplied arguments as an
index instead of a fixnum, because it cannot be negative.

Changed def-source-transform to work with setf functions also.

Removed source-transforms for internal error things, because we just
:translate to them now.  Removed header-ref and %string-char-p source-
transforms, because we don't need them anymore.

Startup Code:

Allocate, but protect against reading or writing, the page following each
of the heaps or stacks.  This keeps os_allocate from deciding to use one
of those pages for something else.

12/5/92 to 1/13/93


Backed out the new LOOP, because it breaks something which causes the
compiler to generate bad code.

Export ARRAY-DISPLACEMENT from the CL package.

Changed kernel:code-debug-info to kernel:%code-debug-info.

Changed several uses of %primitive to eqv functions now that eqv functions


Changed %function-header-mumble to %function-mumble.

Exported FLOATING-POINT-INEXACT from CL, and renamed & exported

Changed di::code-debug-info to kernel:%code-debug-info.


Export FILE-STREAM from LISP as a synonym for FD-STREAM.  Add :INTERACTIVE-P
misc method.

Call *setf-fdefinition-hook* before we check for encapsulation, since the
hook might change the encapsulation.

Changed (code-header-ref component vm:code-debug-info-slot) to
(%code-debug-info component).

Added a #.vm:dylan-function-header-type branch to OUTPUT-FUNCTION.  Also
added a T branch that prints "Unknown Function" so we get some output when
we stumble across unknown functions.

Added :cmu17 to the features list so that PCL can tell if it is in a
version 16 or a version 17 series core.

Fixed a bug in pprint-let that caused to to barf on (let (nil) ...).

Added support for dylan funciton subtypes.

Changed %print-request-server to use print-unreadable-object to get rid of
a spelling error in the old version from pre-puo days.

Weaken type declaration on third SELECT result, since it can be NIL if we get
an error.

Delete #+CLX conditional on HANDLE-QUEUED-CLX-EVENT, since we want to be able
to load-time conditionalize whether CLX is present.

Exported various slot accessors of streams now part of the standard.  Made
these read-only slots.  Added open-stream-p and interactive-stream-p.

Fixed GENTEMP to use its own counter, instead of *gensym-counter*.

Added pretty-printer directives to trace so that arg lists and results
print better.

Fixed untrace-1 not to flame out when untracing untraced functions.

Added module.lisp back in, because ANSI added provide and require back in.


Re-worked the way allocation and primitive slot access are compiled, which
should (hopefully) reduce the size of the backend.

Fixed defknown of %verify-argument-count to have * for the result type
instead of nil.

Extended INFO to take the env-list as an optional fourth argument so that
we don't have to re-bind *info-environment* to get at info environemnts
other then the regular one.

In FINALIZE-XEP-DEFINITION, if not the current global definition, just leave
the defined type alone, instead of clobbering it with FUNCTION.  A benefit of
this is that COMPILE doesn't trash the function type.

Allow non-keyword keyword names when the &key keyword is specified separately
from the variable.

Prevent recursive opportunistic inline expansion during IR1 conversion by
temporarily clearing the DEFINED-FUNCTION-INLINE-EXPANSION when doing the

Changed the make-closure vop to take the length as an info argument because
it is always known at compile time.  Changed the set vop to not have a result
because we don't want it.

Added ANNOTATE-FUNNY-CALL for use with new define-primitive-object stuff.

Startup code:

Increased the size of the sparc's heap.

Changed "environment too big" message to suggest probably a sparc 10.


September-16-92-PCL-e has been incorporated into the CMUCL sources thanks
to Rick Harris. 

11/23/92 to 12/5/92:


Minor fixes to LOOP and DELETE-PACKAGE.

Low level support for various subtypes of function for use with Dylan.

Pre 12/5/92:

For the release notes corresponding to releases prior to 12/5/92, please
see the file: