[DomTree] Remove support for unnumbered graphs (#212026)
After VPlan, all our in-tree users of the dominator tree have numbered
nodes. Remove the support for unnumbered graphs.
Also slightly simplify the numbering for pre-dominator trees to avoid an
extra +1 on every node number.
Merge tag 'rust-fixes-7.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux
Pull rust fixes from Miguel Ojeda:
"Toolchain and infrastructure:
- 'zerocopy' crates: update to v0.8.54 to fix a modpost error under
'CONFIG_CC_OPTIMIZE_FOR_SIZE=y'.
There are actually two updates in the PR: the one to v0.8.52 is
fairly large and was originally not intended for a fixes PR, but the
actual fix landed in the v0.8.54 one. Thus I included both here.
The v0.8.52 update includes two things upstream added for us:
'--cfg no_fp_fmt_parse' to avoid a local workaround, and the new
'most_traits' feature.
The good news is that, after these updates, the delta with upstream
is now trivial: only an identifier prefix change and the SPDX
parentheses.
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tail: Allow repetitive or contraditory options
Unlike its GNU counterpart, our tail(1) has always errored out if given
repetitive or contradictory options, even prior to Keith Bostic's 1991
reimplementation. There is no good reason to continue to do so, not
even tradition, since many other commands (including head(1)) simply
apply the rightmost option in cases like this.
MFC after: 1 week
Reviewed by: allanjude, markj
Differential Revision: https://reviews.freebsd.org/D58192
(cherry picked from commit 9fc14dbe4897c4541113b9ba98236fbd7eb75380)
tail: Allow repetitive or contraditory options
Unlike its GNU counterpart, our tail(1) has always errored out if given
repetitive or contradictory options, even prior to Keith Bostic's 1991
reimplementation. There is no good reason to continue to do so, not
even tradition, since many other commands (including head(1)) simply
apply the rightmost option in cases like this.
MFC after: 1 week
Reviewed by: allanjude, markj
Differential Revision: https://reviews.freebsd.org/D58192
(cherry picked from commit 9fc14dbe4897c4541113b9ba98236fbd7eb75380)
[test] libatexit: leverage __{BEGIN,END}_DECLS
This change converts the longhand form of `extern "C" {` and its
corresponding `}` into `__BEGIN_DECLS` and `__END_DECLS`, respectively.
The new form is much easier to grep for and is a best practice to use in
the FreeBSD tree.
This is meant to be a non-functional change.
MFC after: 1 week
[SCEV] Use DenseMap for constant lookup, bypassing FoldingSet (NFC) (#212022)
Looking up/contructing SCEVConstants is a very frequent operation, with
a notable amount of compile-time spent in SCEV.
Add a new DenseMap, mapping IR constants to SCEVConstant. Constants are
already uniqued, so the pointer based lookup is notably faster than the
folding-set lookup.
The cache is used as fast early-exit, and the SCEVConstants are still
added to the folding set for completeness.
Compile-time impact
* stage1-O3: -0.23%
* stage1-ReleaseThinLTO: -0.21%
* stage1-ReleaseLTO-g: -0.19%
* stage1-aarch64-O3: -0.20%
* stage2-O3: -0.10%
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[libc++] Implement `std::function_ref` (#186692)
Papers:
- P0792R14: function_ref: a type-erased callable reference
- P3948R1 constant_wrapper is the only tool needed for passing constant
expressions via function arguments
- P3961R1 Less double indirection in function_ref (RU-220)
LWG issues:
- LWG4256: Incorrect constraints for function_ref constructors from
nontype_t
- LWG4425: CTAD function_ref of data member pointer should produce
noexcept signature
Fixes #189606
Fixes #105376
Fixes #189604
Fixes #171321
Fixes #171387
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libc: tests: add static to resolve -Wmissing-prototypes
The function create_staticobj() is only used inside this translation unit.
Clang produces a -Wmissing-prototypes warning during standard buildworld.
This warning will become a fatal compile error if MK_WERROR is enabled for hardened builds.
PR: 285870
Fixes: ee9ce1078 ("libc: tests: add some tests for __cxa_atexit...")
Signed-off-by: Zhang Qiyue <peter-open-source.probing805 at aleeas.com>
Reviewed-by: ngie
Pull-Request: https://github.com/freebsd/freebsd-src/pull/2321
Merge tag 'perf-tools-fixes-for-v7.2-1-2026-07-25' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools
Pull perf tools fixes from Arnaldo Carvalho de Melo:
- Update header copies of kernel headers, including const.h, fs.h,
perf_event.h, gfp_types.h, kvm.h, cpufeatures.h, rtnetlink.hp,
msr-index.h, drm.h and socket.h
- Add some build files related to BPF skels to .gitignore
* tag 'perf-tools-fixes-for-v7.2-1-2026-07-25' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools:
tools headers: Sync KVM headers with the kernel sources
tools headers: Sync UAPI linux/fs.h with the kernel sources
perf beauty: Update copy of linux/socket.h with the kernel sources
tools headers: Sync UAPI drm/drm.h with kernel sources
tools arch x86: Sync the msr-index.h copy with the kernel sources
tools headers x86 cpufeatures: Sync with the kernel sources
tools headers: Sync linux/gfp_types.h with the kernel sources
tools headers UAPI: Sync linux/rtnetlink.h with the kernel sources
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