Since ~2019 we have been carrying a libc++ patch in FreeBSD, that adds
the `EINTEGRITY` errno value. At the time, I submitted
https://reviews.llvm.org/D56398 for this, but due to the complicated
`ELAST` handling in `errno.h`, which that patch made even more
complicated, it was put on hold.

I would like to try this again, but much simplified: there is no need to
modify `errno.h`, since all supported versions of FreeBSD define both
`EOWNERDEAD` and `ENOTRECOVERABLE`, so the part that attempts to
redefine `ELAST` is effectively never used, and for FreeBSD we can
simply ignore it.

The only proposed changes will now be to optionally add `EINTEGRITY` as
an `enum errc` value, and add a corresponding test to `errc.pass.cpp`.

Demonstrate `IMPLICIT_DEF implicit-def ...` can be generated after
coalescing on PPC.

The case is reduced from failure in #75570. The failure is triggered
after #75271 .

This patch fixes the miscompilation when we try to bitcast a floating point vector into an integer scalar.

This reverts commit 0fbc728d.

In 88548df0, both the .sec.foo and .tex sections used the same
section flags, hence sharing one segment, pushing the output file
size too large. This breaks on many buildbots.

Now assign section .sec.foo different flags ("awx") from .text ("ax")
so that both sections get their own segment.

Fixed spelling of some classes in code and in documentation.
Fixes for #76101

Added -fexceptions switch to test.
Added missing Fixes for #76101.

Added -fexceptions switch to test.
It were missing in #76101.

Introduce a new (off by default) clang tidy check to ensure that
variables of a specific type are always used even if -Wunused-variables
wouldn't generate a warning.

This check has already caught a couple of different bugs on the codebase
I work on, where not handling a future means that lifetimes may not be
kept alive properly as an async chunk of code may run after a class has
been destroyed, etc.

I would like to upstream it because I believe there could be other
applications of this check that would be useful in different contexts.

---------

Signed-off-by: Tyler Rockwood <rockwood@redpanda.com>

Update DAG ISel to support 64bit versions S_FF1_I32_B64 and
S_FLBIT_I32_B664

---------

Co-authored-by: Acim Maravic <Acim.Maravic@amd.com>

Several buildbots report:
ld.lld: error: failed to open /dev/null: Cannot allocate memory

For example:
- https://lab.llvm.org/buildbot/#/builders/184/builds/8842
- https://lab.llvm.org/buildbot/#/builders/247/builds/12559

Currently there's no component for LLVMPolly and PollyISL, however
they are added to exports whether or not they are installed. This commit
calls add_llvm_install_targets in the add_polly_library function to
allow installation of LLVMPolly and PollyISL via distribution
components, so they can be installed without also installing libPolly.a.

Closes: https://github.com/llvm/llvm-project/pull/66598

Otherwise link may fail if user provided additional library to link with via CMAKE_EXE_LINKER_FLAGS. Concrete example is using custom allocator, LLVMSupport provides needed -lpthread in that case.

Closes: https://github.com/llvm/llvm-project/pull/65424

R_LARCH_CALL36 was designed for function call on medium code model where
the 2 instructions (pcaddu18i + jirl) must be adjacent. This is expected
to replace current medium code model implementation, i.e.
R_LARCH_PCALA_{HI20,LO12} on pcalau12i + jirl.

See https://github.com/loongson/la-abi-specs/pull/3 for more details.

This test file mainly asserts the implementation details of libc++, so
it should be in the `libcxx` subdirectory.

Similar to b9935bb0, but also apply a similar change to
ACCESS_CHECK_ADD.

If ASAN_SHADOW_OFFSET_CONST cannot be encoded as a displacement, switch
to `movabsq` and the register offset variant of cmp.

This patch also add tests whose masks are too narrow to combine. I think
it can help us to find out bugs caused by too large known bits.

Skip checking `TemplateTypeParmDecl ` in `VisitTypeAliasTemplateDecl`.
[Fix this crash](https://github.com/llvm/llvm-project/issues/74765

)

Co-authored-by: huqizhi <836744285@qq.com>

Zvfbfmin doesn't need Zfbfmin also enabled.

Most basic block do not need to query dominates. Defer initialization of
InstrPosIndexes to first query for each MBB.

This patch folds xor of icmps into a single comparison using range-based reasoning as `foldAndOrOfICmpsUsingRanges` does.
Fixes #70928.

This is a follow up to #75635 which broke the build on Fuchsia. We don't
support ifunc on Fuchsia so we shouldn't define __init_cpu_features. For
__init_cpu_features_resolver we have to use _zx_system_get_features as a
Zircon native solution.

Previously the JITLink MachO backends (aarch64 and x86-64) only looked at the
fixup block to determine which symbol was being fixed up. This assumption breaks
if both symbols used in the subtractor are in the same block. The fix is to
check for such cases and use the offsets of each symbol to decide which is being
fixed up.

The issue only resulted in incorrect behavior for negative-delta relocations,
so the testcases use eh-frames with explicit edges for the CIE-pointer field in
FDEs (since these are negative-deltas).

rdar://119351329

Similar to the existing isZExtFree(SDValue, EVT) wrapper, this will allow targets to override for specific cases (e.g. free truncation of an ext/extload node). But for now its just used to wrap the existing isTruncateFree(EVT, EVT) call.

The current command will raise an error:

> The `opt -passname` syntax for the new pass manager is not supported,
please use `opt -passes=<pipeline>` (or the `-p` alias for a more
concise version).

Update the usage now.

This patch is to extract the NFC in #76319 into a separate commit.

This is needed because Windows doesn't have anything equivalent to the
POSIX fnmatch() function.

This patch adds support for `__riscv_clmulr_32/64` in `riscv_bitmanip.h`.
It also fixes the extension requirements of `clmul/clmulh`.

This patch replaces `__builtin_riscv_cpop_32/64` with `__builtin_popcount(ll)` because `__builtin_riscv_cpop_32/64` is not implemented in clang.