llvm: add LoongArch target support, not enabled by default

Note there is ongoing work to add LoongArch support to the base system,
but having target support in llvm is an essential component.

This

llvm: add LoongArch target support, not enabled by default

Note there is ongoing work to add LoongArch support to the base system,
but having target support in llvm is an essential component.

This must be explicitly enabled using WITH_LLVM_TARGET_LOONGARCH.

Reviewed by: dim
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D59899

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llvm: remove Mips target support

The Mips architecture has been removed from all supported branches now.

MFC after: 1 week

build: Retire LLVM_COV src.conf knob

I introduced it in commit 1b49115a40ad ("Promote llvm-cov to a
standalone option"). llvm-cov was previously enabled as part of the
CLANG_EXTRAS option. I made

build: Retire LLVM_COV src.conf knob

I introduced it in commit 1b49115a40ad ("Promote llvm-cov to a
standalone option"). llvm-cov was previously enabled as part of the
CLANG_EXTRAS option. I made it a standalone, default-enabled option for
parity with the tools provided by the GCC-based toolchain.

We no longer provide an in-tree GCC toolchain. Now, just build llvm-cov
along with Clang to simplify build infrastructure.

Reviewed by: dim
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D58155

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Fix building with LLVM_BINUTILS_BOOSTRAP but without CLANG_BOOTSTRAP

Without this change I get various undefined symbol errors when trying to
link llvm-nm and llvm-objcopy during the cross-tools sta

Fix building with LLVM_BINUTILS_BOOSTRAP but without CLANG_BOOTSTRAP

Without this change I get various undefined symbol errors when trying to
link llvm-nm and llvm-objcopy during the cross-tools stage.

Test Plan: builds now
Reviewed by: dim, emaste
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D56873

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Fixups after llvm-project main llvmorg-21-init-19288-gface93e724f4 merge

Fix various configuration fails, update generated headers, Makefiles, etc.

PR: 292067
MFC after: 1 month

llvm: Link private LLVM libraries against compiler_rt for aarch64

This is required for GCC which uses libcalls for outlined atomics.

Reviewed by: dim
Differential Revision: https://reviews.freebsd.

llvm: Link private LLVM libraries against compiler_rt for aarch64

This is required for GCC which uses libcalls for outlined atomics.

Reviewed by: dim
Differential Revision: https://reviews.freebsd.org/D55157

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src.conf: Add WITH_LLVM_LINK_STATIC_LIBRARIES build knob

In commit 2e47f35be5dc libllvm, libclang and liblldb were converted into
private shared libraries. This allowed clang, lld, lldb, and other l

src.conf: Add WITH_LLVM_LINK_STATIC_LIBRARIES build knob

In commit 2e47f35be5dc libllvm, libclang and liblldb were converted into
private shared libraries. This allowed clang, lld, lldb, and other llvm
tools to be linked against these shared libraries, which makes them
smaller and avoids duplication.

However, this also comes at the cost of some performance, since the
dynamic libraries are quite large, and contain lots of long symbols
(mangled C++ identifiers).

Add a WITH_LLVM_LINK_STATIC_LIBRARIES build knob that can be used to go
back to the previous behavior: libllvm, libclang and liblldb are built
as internal static libraries, i.e. only available during buildworld, and
fully linked into the various executables such as clang, lld, etc.

PR: 287447
Reviewed by: emaste
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D50956

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Remove debug crutch I accidentally left in

Fixes: cf1eaaf41cef
MFC after: 1 week

Reduce number of external symbols in libllvm, libclang and liblldb

In commit 2e47f35be5dc libllvm, libclang and liblldb were converted into
private shared libraries. This allowed clang, lld, lldb, a

Reduce number of external symbols in libllvm, libclang and liblldb

In commit 2e47f35be5dc libllvm, libclang and liblldb were converted into
private shared libraries. This allowed clang, lld, lldb, and other llvm
tools to be linked against these shared libraries, which makes them
smaller and avoids duplication.

However, upstream builds the shared libraries using several visibility
options, which reduces the number of external symbols, and makes the
libraries a bit smaller.

On my test machine:
* libprivatellvm.so goes from 75643 to 34706 symbols (~54% reduction)
* libprivateclang.so goes from 53250 to 33531 symbols (~37% reduction)
* libprivatelldb.so goes from 27242 to 18798 symbols (~31% reduction)

Note: to get the full benefit, a clean build is required. Incremental
builds should still work, but I didn't want to force a full rebuild on
everybody.

MFC after: 1 week

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Remove TableGen objects from libllvm, fixing bad option registrations

In 986e05bc2a18 I revamped the build for all the llvm subprojects. Among
others I added objects under contrib/llvm-project/llvm/

Remove TableGen objects from libllvm, fixing bad option registrations

In 986e05bc2a18 I revamped the build for all the llvm subprojects. Among
others I added objects under contrib/llvm-project/llvm/lib/TableGen, but
I missed that upstream explicitly removes these when building the shared
llvm library:

https://github.com/llvm/llvm-project/blob/llvmorg-19.1.7/llvm/tools/llvm-shlib/CMakeLists.txt#L23

In 2e47f35be5dc I converted libllvm to a shared library. From that point
onwards, some of the global command line option objects registered in
llvm/lib/TableGen/Main.cpp conflict with similar objects in tools like
llvm-cov, llvm-as, etc.

This results in an error when running these tools: "CommandLine Error:
Option 'o' registered more than once!", followed by a fatal exit.

Fix this by removing the TableGen objects from libllvm. Note that we no
longer install any of the tblgen binaries, these are only used during
buildworld, and then in a statically linked form.

PR: 291233
MFC after: 3 days

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Convert libllvm, libclang and liblldb into private shared libraries

This allows clang, lld, lldb, and other llvm tools to be linked against
these shared libraries, which makes them smaller and avoid

Convert libllvm, libclang and liblldb into private shared libraries

This allows clang, lld, lldb, and other llvm tools to be linked against
these shared libraries, which makes them smaller and avoids duplication.

Since these are not quite the same as the shared libraries shipped by
the upstream llvm build system, and we do not want to expose the ABI to
external programs such as ports, make them private libraries.

Note that during the cross-tools stage they are still built as static
libraries, so the cross compiler and linker are static binaries, as they
have always been.

This also requires a depend-cleanup.sh kludge which will be added in a
follow-up commit, to ensure binaries are rebuilt against the shared
libraries in case of incremental builds.

MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D49967

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libllvm: remove duplicated SRCS_MIN line

This is not harmful when making a static library apparently, but will
result in duplicate symbol errors when making a dynamic library.

MFC after: 3 days

Merge llvm-project release/19.x llvmorg-19.1.0-rc1-0-ga4902a36d5c2

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project release/19.x llvmorg-19.1.0-rc1-0-ga

Merge llvm-project release/19.x llvmorg-19.1.0-rc1-0-ga4902a36d5c2

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project release/19.x llvmorg-19.1.0-rc1-0-ga4902a36d5c2.

PR: 280562
MFC after: 1 month

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Merge llvm-project main llvmorg-19-init-18630-gf2ccf80136a0

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-19-init-18630-gf2ccf80136a0, t

Merge llvm-project main llvmorg-19-init-18630-gf2ccf80136a0

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-19-init-18630-gf2ccf80136a0, the
last commit before the upstream release/19.x branch was created.

PR: 280562
MFC after: 1 month

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Remove residual blank line at start of Makefile

This is a residual of the $FreeBSD$ removal.

MFC After: 3 days (though I'll just run the command on the branches)
Sponsored by: Netflix

libllvm: add missed tlbgen headers and sources for BPF target

Noticed by: vishwin
PR: 276104
MFC after: 1 month

Merge llvm-project release/18.x llvmorg-18.1.0-rc2-0-gc6c86965d967

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project release/18.x llvmorg-18.1.0-rc2-0-gc

Merge llvm-project release/18.x llvmorg-18.1.0-rc2-0-gc6c86965d967

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project release/18.x llvmorg-18.1.0-rc2-0-gc6c86965d967.

PR: 276104
MFC after: 1 month

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Merge llvm-project main llvmorg-18-init-18359-g93248729cfae

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-18359-g93248729cfae, t

Merge llvm-project main llvmorg-18-init-18359-g93248729cfae

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-18359-g93248729cfae, the
last commit before the upstream release/18.x branch was created.

PR: 276104
MFC after: 1 month

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Merge llvm-project main llvmorg-18-init-16864-g3b3ee1f53424

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-16864-g3b3ee1f53424.

Merge llvm-project main llvmorg-18-init-16864-g3b3ee1f53424

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-16864-g3b3ee1f53424.

PR: 276104
MFC after: 1 month

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Merge llvm-project main llvmorg-18-init-16595-g7c00a5be5cde

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-16595-g7c00a5be5cde.

Merge llvm-project main llvmorg-18-init-16595-g7c00a5be5cde

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-16595-g7c00a5be5cde.

PR: 276104
MFC after: 1 month

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Merge llvm-project main llvmorg-18-init-16003-gfc5f51cf5af4

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-16003-gfc5f51cf5af4.

Merge llvm-project main llvmorg-18-init-16003-gfc5f51cf5af4

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-16003-gfc5f51cf5af4.

PR: 276104
MFC after: 1 month

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Merge llvm-project main llvmorg-18-init-15692-g007ed0dccd6a

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-15692-g007ed0dccd6a.

Merge llvm-project main llvmorg-18-init-15692-g007ed0dccd6a

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-15692-g007ed0dccd6a.

PR: 276104
MFC after: 1 month

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Merge llvm-project main llvmorg-18-init-15088-gd14ee76181fb

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-15088-gd14ee76181fb.

Merge llvm-project main llvmorg-18-init-15088-gd14ee76181fb

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-15088-gd14ee76181fb.

PR: 276104
MFC after: 1 month

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Optionally create full debuginfo for llvm-related executables

Commit de6feefdb7cfd limited the amount of debuginfo generated for clang
and other llvm-related executables. This was done to save disk

Optionally create full debuginfo for llvm-related executables

Commit de6feefdb7cfd limited the amount of debuginfo generated for clang
and other llvm-related executables. This was done to save disk space and
memory during building, but it makes debugging any of these executables
much harder.

Add a new src.conf(5) setting, WITH_LLVM_FULL_DEBUGINFO, to generate
full debuginfo instead. This is off by default, but could for example be
enabled for release builds or snapshots, so llvm executables are easier
to debug.

Reviewed by: emaste
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D43839

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Add libllvm and liblldb source files to enable WITH_ASAN build

This is another part of fixing the WITH_ASAN build. Some additional
source files had to be added to libllvm and liblldb, since the ASan

Add libllvm and liblldb source files to enable WITH_ASAN build

This is another part of fixing the WITH_ASAN build. Some additional
source files had to be added to libllvm and liblldb, since the ASan
instrumentation causes symbols in those files to be referenced.

Reported by: markj
PR: 276597
MFC after: 3 days

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