Merge commit 4bb2416d42eb from llvm-project (by Jessica Clarke):

[builtins][AArch64] Implement _sync out-of-line atomics

Whilst Clang does not use these, recent GCC does, and so on systems such

Merge commit 4bb2416d42eb from llvm-project (by Jessica Clarke):

[builtins][AArch64] Implement _sync out-of-line atomics

Whilst Clang does not use these, recent GCC does, and so on systems such
as FreeBSD that wish to use compiler-rt as the system runtime library
but also wish to support building programs with GCC these interfaces are
needed.

This is a light adaptation of the code committed to GCC by Sebastian Pop
<[email protected]>, relicensed with permission for use in compiler-rt.

Fixes https://github.com/llvm/llvm-project/issues/63483

Reviewed By: sebpop, MaskRay

Differential Revision: https://reviews.llvm.org/D158536

Reviewed by: dim
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D41716

(cherry picked from commit 8524dc53fd4c6b79d75b82cb82f3ac72fc25e85f)

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Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Build compiler-rt against libunwind, not libcxxrt

Parts of compiler-rt are also built for libgcc_eh and libgcc_s, and
these were already pointing to the libunwind unwind.h. For the sake of
consisten

Build compiler-rt against libunwind, not libcxxrt

Parts of compiler-rt are also built for libgcc_eh and libgcc_s, and
these were already pointing to the libunwind unwind.h. For the sake of
consistency, also build compiler-rt itself against the libunwind
unwind.h, not the libcxxrt one.

MFC after: 3 days

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compilert-rt: build out-of-line LSE atomics helpers for aarch64

Both clang >= 12 and gcc >= 10.1 now default to -moutline-atomics for
aarch64. This requires a bunch of helper functions in libcompile

compilert-rt: build out-of-line LSE atomics helpers for aarch64

Both clang >= 12 and gcc >= 10.1 now default to -moutline-atomics for
aarch64. This requires a bunch of helper functions in libcompiler_rt.a,
to avoid link errors like "undefined symbol: __aarch64_ldadd8_acq_rel".

(Note: of course you can use -mno-outline-atomics as a workaround too,
but this would negate the potential performance benefit of the faster
LSE instructions.)

Bump __FreeBSD_version so ports maintainers can easily detect this.

PR: 257392
MFC after: 2 weeks

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Rename NO_WERROR -> MK_WERROR=no

As suggested in D27598. This also supports MK_WERROR.clang=no and
MK_WERROR.gcc=no to support the existing NO_WERROR.<compiler> uses.

Reviewed By: brooks
Differenti

Rename NO_WERROR -> MK_WERROR=no

As suggested in D27598. This also supports MK_WERROR.clang=no and
MK_WERROR.gcc=no to support the existing NO_WERROR.<compiler> uses.

Reviewed By: brooks
Differential Revision: https://reviews.freebsd.org/D27601

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libcompiler_rt: stop building with stack smashing protection

libcompiler_rt implements certain functions that clang and gcc emit
calls to as part of their codegen (e.g. for extended width math). Bu

libcompiler_rt: stop building with stack smashing protection

libcompiler_rt implements certain functions that clang and gcc emit
calls to as part of their codegen (e.g. for extended width math). Build
it without stack smashing protection (SSP, -fstack-protector) in order
to support building binaries without SSP, especially the dynamic linker.
Besides, SSP is probably not very valuable in this library.

Reviewed by: arichardson, dim, kib
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D27786

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Fix llvm-libunwind userspace build on ARM

GCC's libgcc exports a few ARM-specific symbols for ARM EABI, AEABI, or
EHABI or whatever it's called. Export the same ones from LLVM-libunwind's
libgcc_s,

Fix llvm-libunwind userspace build on ARM

GCC's libgcc exports a few ARM-specific symbols for ARM EABI, AEABI, or
EHABI or whatever it's called. Export the same ones from LLVM-libunwind's
libgcc_s, on ARM. As part of this, convert libgcc_s from a direct
Version.map to one constructed from component Symbol.map files. This allows
the ARM-specific Symbol.map to be included only on ARM.

Fix ARM-only oddities in struct name/aliases in LLVM-libunwind to match
non-ARM definitions and ARM-specific expectations in libcxxrt /
libcompiler_rt.

No functional change intended for non-ARM architectures.

This commit does not actually flip the switch for ARM defaults from libgcc
to llvm-libunwind, but makes it possible (to compile, anyway).

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Gcc has incompatible internal declarations for __divtc3 and __multc3 as
defined in compiler-rt, but it has no option to silence its warning, so
make gcc warnings for libcompiler_rt non-fatal.

Notice

Gcc has incompatible internal declarations for __divtc3 and __multc3 as
defined in compiler-rt, but it has no option to silence its warning, so
make gcc warnings for libcompiler_rt non-fatal.

Noticed by: lwhsu
MFC after: 3 days

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Remove an assembler flag, which is redundant since r309124. The upstream
took care of it by introducing a macro NO_EXEC_STACK_DIRECTIVE.

http://llvm.org/viewvc/llvm-project?rev=273500&view=rev

Rev

Remove an assembler flag, which is redundant since r309124. The upstream
took care of it by introducing a macro NO_EXEC_STACK_DIRECTIVE.

http://llvm.org/viewvc/llvm-project?rev=273500&view=rev

Reviewed by: dim

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libcompiler_rt: move file list to Makefile.inc for reuse elsewhere

Also switch to the style used in the clang390-import branch to reduce
future conflicts.

Reviewed by: dim
Sponsored by: The FreeBSD

libcompiler_rt: move file list to Makefile.inc for reuse elsewhere

Also switch to the style used in the clang390-import branch to reduce
future conflicts.

Reviewed by: dim
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D8039

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libcompiler_rt: use ${SRCTOP} for the top of the FreeBSD tree

Fix building some arm-specific primitives for libcompiler_rt. This was
an unfortunate search and replace error.

Make armv6 hard float abi by default. Kill armv6hf.
Allow CPUTYPE=soft to build the current soft-float abi libraries.
Add UPDATING entry to announce this.

Approved by: re@ (gjb)

First pass through library packaging.

Sponsored by: The FreeBSD Foundation

Annotate arm userspace assembler sources stating their tolerance to
the non-executable stack.

Reviewed by: andrew
Sponsored by: The FreeBSD Foundation

compiler_rt: add floatunsitf for arm64

It provides unsigned integer to quad-precision conversion.

Sponsored by: The FreeBSD Foundation

compiler-rt: include 128-bit quad precision fp support only on arm64

Other architectures do not use quad precision long double and don't need
these runtime support routines.

Differential Revision:

compiler-rt: include 128-bit quad precision fp support only on arm64

Other architectures do not use quad precision long double and don't need
these runtime support routines.

Differential Revision: https://reviews.freebsd.org/D2252
Reviewed by: dim
Sponsored by: The FreeBSD Foundation

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compiler-rt: add floatditf and floatunditf

These are long integer (di_int/du_int) to quad precision floating point
conversions. They may be reworked based on upstream discussion. These
versions are

compiler-rt: add floatditf and floatunditf

These are long integer (di_int/du_int) to quad precision floating point
conversions. They may be reworked based on upstream discussion. These
versions are here to support arm64 world builds.

Reviewed by: ed
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D2174

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compiler-rt: Implement multc3 - quad-precision complex multiplication

This may be reworked based on upstream discussion. This version is here
to support arm64 world builds.

Reviewed by: ed
Sponsore

compiler-rt: Implement multc3 - quad-precision complex multiplication

This may be reworked based on upstream discussion. This version is here
to support arm64 world builds.

Reviewed by: ed
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D2173

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compiler-rt: Build additional quad precision floating point builtins

These are needed for arm64

Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D2160

Pull in r231965 from upstream compiler-rt trunk (by Jörg Sonnenberger):

Refactor float to integer conversion to share the same code.
80bit Intel/PPC long double is excluded due to lacking suppo

Pull in r231965 from upstream compiler-rt trunk (by Jörg Sonnenberger):

Refactor float to integer conversion to share the same code.
80bit Intel/PPC long double is excluded due to lacking support
for the abstraction. Consistently provide saturation logic.
Extend to long double on 128bit IEEE extended platforms.

Initial patch with test cases from GuanHong Liu.
Reviewed by Steve Canon.

Differential Revision: http://reviews.llvm.org/D2804

Pull in r232107 from upstream compiler-rt trunk (by Ed Maste):

Use signed int implementation for __fixint

Requested by: emaste

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With the update of compiler-rt we try to build a number of files that
don't build on some ARM platforms, provide symbols we already provide in
libc, or don't exist. Remove these from the build. Some

With the update of compiler-rt we try to build a number of files that
don't build on some ARM platforms, provide symbols we already provide in
libc, or don't exist. Remove these from the build. Some of these may
return later on specific targets.

Differential Revision: https://reviews.freebsd.org/D1468
Reviewed by: dim, imp

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Clean up detection of hard-float ABIs. As with big-endian in r272368 we
can check against arm*hf*.

Remove MK_ARM_EABI, the armeb issues have been fixed. The code to support
the oabi is still in the tree, but it is expected this will be removed
as developers work on surrounding code.

With this com

Remove MK_ARM_EABI, the armeb issues have been fixed. The code to support
the oabi is still in the tree, but it is expected this will be removed
as developers work on surrounding code.

With this commit the ARM EABI is the only supported supported ABI by
FreeBSD on ARMa 32-bit processors.

X-MFC after: never
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D876

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Use src.opts.mk in preference to bsd.own.mk except where we need stuff
from the latter.