A program can use `make-arity-wrapper-procedure` to synthesize a
function that reports a given arity mask (without calling `compile`).
In addition, `set-arity-wrapper-procedure!` suports modifying the
implementation of a synthesized procedure. Although similar
functionality could be achieved with `(lambda args (apply (unbox proc)
args))`, an arity wrapper procedure can dispatch to another procedure
without allocating a list for the arguments.
The interpreter now uses an internal variant of arity wrappers to
cooperate with `procedure-arity-mask`.
original commit: 5fede14302840b55edbeb7565e28d09350a4b2e9
- fixed an issue with the library system where an exception that occurs
during visit or revisit left the library in an inconsistent state that
caused it to appear that it was still in the process of running. This
manifested in it raising a cyclic dependency exception, even though
there really is not a cyclic dependency. The various library
management functions involved will now reset the part of the library
when an exception occurs. This also means that if the library visit
or revisit failed for a transient reason (such as a missing or
incorrect library version that can be fixed by updating the
library-directories) it is now possible to recover from these errors.
expand-lang.ss, syntax.ss, interpret.ss, compile.ss, cprep.ss,
8.ms
original commit: 6dbd72496fb4eaf5fb65453d0ae0a75f0ef2ad80
Also, report an error if a string type is misused as an argument (for
foreign procedures) or result (for foreign callables) with
`__collect_safe`.
original commit: cdbfa3d86cb0719bf0979b3fe0aa5c4383282b77
commonizatio pass and support for specifying default record
equal and hash procedures:
- more staid and consistent Mf-cross main target
Mf-cross
- cpletrec now replaces the incoming prelexes with new ones so
that it doesn't have to alter the flags on the incoming ones, since
the same expander output is passed through the compiler twice while
compiling a file with macro definitions or libraries. we were
getting away without this just by luck.
cpletrec.ss
- pure? and ivory? now return #t for a primref only if the prim is
declared to be a proc, since some non-proc prims are mutable, e.g.,
$active-threads and $collect-request-pending.
cp0.ss
- $error-handling-mode? and $eol-style? are now properly declared to
be procs rather than system state variables.
primdata.ss
- the new pass $check-prelex-flags verifies that prelex referenced,
multiply-referenced, and assigned flags are set when they
should be. (it doesn't, however, complain if a flag is set
when it need not be.) when the new system parameter
$enable-check-prelex-flags is set, $check-prelex-flags is
called after each major pass that produces Lsrc forms to verify
that the flags are set correctly in the output of the pass.
this parameter is unset by default but set when running the
mats.
cprep.ss, back.ss, compile.ss, primdata.ss,
mats/Mf-base
- removed the unnecessary set of prelex referenced flag from the
build-ref routines when we've just established that it is set.
syntax.ss, compile.ss
- equivalent-expansion? now prints differences to the current output
port to aid in debugging.
mat.ss
- the nanopass that patches calls to library globals into calls to
their local counterparts during whole-program optimization now
creates new prelexes and sets the prelex referenced, multiply
referenced, and assigned flags on the new prelexes rather than
destructively setting flags on the incoming prelexes. The
only known problems this fixes are (1) the multiply referenced
flag was not previously being set for cross-library calls when
it should have been, resulting in overly aggressive inlining
of library exports during whole-program optimization, and (2)
the referenced flag could sometimes be set for library exports
that aren't actually used in the final program, which could
prevent some unreachable code from being eliminated.
compile.ss
- added support for specifying default record-equal and
record-hash procedures.
primdata.ss, cmacros.ss, cpnanopass.ss, prims.ss, newhash.ss,
gc.c,
record.ms
- added missing call to relocate for subset-mode tc field, which
wasn't burning us because the only valid non-false value, the
symbol system, is in the static generation after the initial heap
compaction.
gc.c
- added a lambda-commonization pass that runs after the other
source optimizations, particularly inlining, and a new parameter
that controls how hard it works. the value of commonization-level
ranges from 0 through 9, with 0 disabling commonization and 9
maximizing it. The default value is 0 (disabled). At present,
for non-zero level n, the commonizer attempts to commonize
lambda expressions consisting of 2^(10-n) or more nodes.
commonization of one or more lambda expressions requires that
they have identical structure down to the leaf nodes for quote
expressions, references to unassigned variables, and primitives.
So that various downstream optimizations aren't disabled, there
are some additional restrictions, the most important of which
being that call-position expressions must be identical. The
commonizer works by abstracting the code into a helper that
takes the values of the differing leaf nodes as arguments.
the name of the helper is formed by concatenating the names of
the original procedures, separated by '&', and this is the name
that will show up in a stack trace. The source location will
be that of one of the original procedures. Profiling inhibits
commonization, because commonization requires profile source
locations to be identical.
cpcommonize.ss (new), compile.ss, interpret.ss, cprep.ss,
primdata.ss, s/Mf-base,
mats/Mf-base
- cpletrec now always produces a letrec rather than a let for
single immutable lambda bindings, even when not recursive, for
consistent expand/optimize output whether the commonizer is
run or not.
cpletrec.ss,
record.ms
- trans-make-ftype-pointer no longer generates a call to
$verify-ftype-address if the address expression is a call to
ftype-pointer-address.
ftype.ss
original commit: b6a3dcc814b64faacc9310fec4a4531fb3f18dcd
scheme.1.in, newrelease
- removed version update of no-longer-existing bldnt.bat. "fixed"
sed patterns to replace \? with * for the benefit of the deficient
mac sed.
newrelease
- updated version to 9.5
bintar BUILDING NOTICE makefiles/Mf-install.in scheme.1.in
c/Makefile.i3nt c/Makefile.a6nt c/Makefile.ti3nt c/Makefile.ta6nt
workarea c/scheme.rc s/7.ss s/cmacros.ss
release_notes/release_notes.stex csug/csug.stex
- updated release notes and fixed user's guide overfull hbox.
release-notes.stex, syntax.stex
- updated install target to do something more sensible
release_notes/Makefile
original commit: adb3b7bb22ddaa1ba91b98b6f4a647427c3a4d9b
Add optional beginning-line and beginning-column components to a
source object, so that line and column information can be recorded
independent of the file. Add `locate-source-object-source` to use
the recorded information. Add a cache for `locate-source` as enabled by
the `use-cache?` optional argument, which can avoid compilation times
that are quadratic in the number of `let-values` or `define-values`
forms.
original commit: b36fab81d5041a54ce01a422395eee79d2f930bc
Revert the use of ephemeron pairs in weak hashtables, since the
difference is visible via guardians. Add hashtable based on ephemerons
(to avoid key-in-value problems) as an explicit variant.
original commit: 31ac6d78592e1a9ba6bfbe802260e3d56d4cf772
8-byte read instead of a 4-byte read to pick up the 4 highest-order
bytes of a little-endian flonum, potentially reading past the end of
mapped memory for flonums produced by taking the imaginary part of an
inexact complexnum (which, unlike other flonums, are not aligned on
16-byte boundaries). The 8-byte load would also have failed to produce
correct results on 64-bit big-endian machines (of which we presently
have none) because the offsets passed to flonum-extractor assume the
bits are in the lowest-order 4 bytes of the extracted field.
cp0.ss,
misc.ms,
release_notes.stex
original commit: 97bd75bcedbcf32b77c59615a638ea1528ebe26b
Accesses existing-but-hidden DST information in date records,
and adds support for getting a name of the current time zone
when a time zone offset is not explicitly provided.
original commit: 3c8be62d12a8197018fb6c5aae182fd75da14fe8
arguments. cp0 optimizes away a number of additional equality
operations at optimize-level 3 (including bytevector=?) when
applied to the same variable references, as it already did for
eq?, eqv?, and equal?, at all optimize levels.
cpnanopass.ss, cp0.ss, primdata.ss,
cp0.ms
- updated bullyx patches
patch*
- updated release notes and tweaked user's guide.
release-notes.stex, objects.stex
original commit: e90c39a72563eafa4fccaf1d197060bf20aa552f
and release notes. updated the release notes to account for a couple
of other log entries.
release_notes.stex,
intro.stex, io.stex
original commit: 7d1bbdaaccc6640e1529fdbd8b40a8ff7012bee4
form for later passes to choke on. also fixed cp0 to print the correct
name for cpvalid when it does this.
cpvalid.ss, cp0.ss,
misc.ms
- updated the prototype for s_ee_write_char to match the definition
expeditor.c
- updated LOG and release_notes
- rebuilt boot files due to s-directory changes
original commit: 50aa8b34774a9e65e96481ae329a3f329fad7aca
because these fields can be accessed from multiple threads concurrently.
Updated $yield and $thread-check in mats/thread.ms to be more tolerant of timing variability.
original commit: 0a6a1e14e7ecb9e39fa7a10a8584ed2fec24cbf4
- added a cast to eliminate warnings in c/number.c
- fixed bug in Windows version of directory-separator-predicate in s/6.ss when path-* procedures are passed a path that is not a string.
- fixed bug in s/cp0.ss on Windows with $foreign-wchar?.
- fixed spelling of non-existent
original commit: dd1b741f7572cb0d5a6210c7c796aee7c4026040
reflect the Version 9.3.1 change from sstats structures to sstats
records, with sstats times represented as time objects and sstats
bytes and counts represented as exact integers; also updated the
sstats-difference description to reflect that it no longer coerces
negative differences to zero. added a corresponding release note.
system.stex,
release_notes.stex
original commit: cd93f130c2a911d67bc19b75da0f205d50b8f6ff
dated back to Version 8.4 or before and to combine the three performance
subsections directly related to the new compiler back-end, since the
changes all occurred between publicly available releases.
original commit: 65df1d1f7c37f5b5a93cd7e5b475dda9dbafe03c
