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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Merge llvm-project main llvmorg-16-init-18548-gb0daacf58f41

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-16-init-18548-gb0daacf58f41.

PR: 271047
MFC af

Merge llvm-project main llvmorg-16-init-18548-gb0daacf58f41

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-16-init-18548-gb0daacf58f41.

PR: 271047
MFC after: 1 month

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Merge llvm-project main llvmorg-15-init-15358-g53dc0f10787

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-15-init-15358-g53dc0f10787.

PR: 265425
MFC afte

Merge llvm-project main llvmorg-15-init-15358-g53dc0f10787

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-15-init-15358-g53dc0f10787.

PR: 265425
MFC after: 2 weeks

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Merge llvm-project main llvmorg-14-init-13186-g0c553cc1af2e

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-14-init-13186-g0c553cc1af2e.

PR: 261742
MFC af

Merge llvm-project main llvmorg-14-init-13186-g0c553cc1af2e

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-14-init-13186-g0c553cc1af2e.

PR: 261742
MFC after: 2 weeks

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Merge llvm-project main llvmorg-14-init-11187-g222442ec2d71

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-14-init-11187-g222442ec2d71.

PR: 261742
MFC af

Merge llvm-project main llvmorg-14-init-11187-g222442ec2d71

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-14-init-11187-g222442ec2d71.

PR: 261742
MFC after: 2 weeks

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Merge llvm-project main llvmorg-13-init-16847-g88e66fa60ae5

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-13-init-16847-g88e66fa60ae5, the last commit bef

Merge llvm-project main llvmorg-13-init-16847-g88e66fa60ae5

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-13-init-16847-g88e66fa60ae5, the last commit before
the upstream release/13.x branch was created.

PR: 258209
MFC after: 2 weeks

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Merge llvm-project main llvmorg-12-init-17869-g8e464dd76bef

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-12-init-17869-g8e464dd76bef, the last commit bef

Merge llvm-project main llvmorg-12-init-17869-g8e464dd76bef

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-12-init-17869-g8e464dd76bef, the last commit before the
upstream release/12.x branch was created.

PR: 255570
MFC after: 6 weeks

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Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp
release/11.x llvmorg-11.0.0-rc1-25-g903c872b169.

Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp
master 2e10b7a39b9, the last commit before the llvmorg-12-init tag, from
which release/11.x was branched.

Note that for now, I

Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp
master 2e10b7a39b9, the last commit before the llvmorg-12-init tag, from
which release/11.x was branched.

Note that for now, I rolled back all our local changes to make merging
easier, and I will reapply the still-relevant ones after updating to
11.0.0-rc1.

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Merge ^/vendor/lvm-project/master up to its last change (upstream commit
e26a78e70), and resolve conflicts.

Merge ^/vendor/llvm/dist up to its last change, and resolve conflicts.

Move all sources from the llvm project into contrib/llvm-project.

This uses the new layout of the upstream repository, which was recently
migrated to GitHub, and converted into a "monorepo". That i

Move all sources from the llvm project into contrib/llvm-project.

This uses the new layout of the upstream repository, which was recently
migrated to GitHub, and converted into a "monorepo". That is, most of
the earlier separate sub-projects with their own branches and tags were
consolidated into one top-level directory, and are now branched and
tagged together.

Updating the vendor area to match this layout is next.

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Merge llvm trunk r366426, resolve conflicts, and update FREEBSD-Xlist.

Pull in r366369 from upstream llvm trunk (by Francis Visoiu Mistrih):

[CodeGen][NFC] Simplify checks for stack protector index checking

Use `hasStackProtectorIndex()` instead of `getStackProtec

Pull in r366369 from upstream llvm trunk (by Francis Visoiu Mistrih):

[CodeGen][NFC] Simplify checks for stack protector index checking

Use `hasStackProtectorIndex()` instead of `getStackProtectorIndex()
>= 0`.

Pull in r366371 from upstream llvm trunk (by Francis Visoiu Mistrih):

[PEI] Don't re-allocate a pre-allocated stack protector slot

The LocalStackSlotPass pre-allocates a stack protector and makes sure
that it comes before the local variables on the stack.

We need to make sure that later during PEI we don't re-allocate a new
stack protector slot. If that happens, the new stack protector slot
will end up being **after** the local variables that it should be
protecting.

Therefore, we would have two slots assigned for two different stack
protectors, one at the top of the stack, and one at the bottom. Since
PEI will overwrite the assigned slot for the stack protector, the
load that is used to compare the value of the stack protector will
use the slot assigned by PEI, which is wrong.

For this, we need to check if the object is pre-allocated, and re-use
that pre-allocated slot.

Differential Revision: https://reviews.llvm.org/D64757

Pull in r367068 from upstream llvm trunk (by Francis Visoiu Mistrih):

[CodeGen] Don't resolve the stack protector frame accesses until PEI

Currently, stack protector loads and stores are resolved during
LocalStackSlotAllocation (if the pass needs to run). When this is the
case, the base register assigned to the frame access is going to be
one of the vregs created during LocalStackSlotAllocation. This means
that we are keeping a pointer to the stack protector slot, and we're
using this pointer to load and store to it.

In case register pressure goes up, we may end up spilling this
pointer to the stack, which can be a security concern.

Instead, leave it to PEI to resolve the frame accesses. In order to
do that, we make all stack protector accesses go through frame index
operands, then PEI will resolve this using an offset from sp/fp/bp.

Differential Revision: https://reviews.llvm.org/D64759

Together, these fix a issue where the stack protection feature in LLVM's
ARM backend can be rendered ineffective when the stack protector slot is
re-allocated so that it appears after the local variables that it is
meant to protect, leaving the function potentially vulnerable to a
stack-based buffer overflow.

Reported by: andrew
Security: https://kb.cert.org/vuls/id/129209/
MFC after: 3 days

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Merge llvm trunk r351319, resolve conflicts, and update FREEBSD-Xlist.

Merge llvm trunk r338150, and resolve conflicts.

Merge llvm trunk r321017 to contrib/llvm.

Merge llvm, clang, lld, lldb, compiler-rt and libc++ r305145, and update
build glue.

Merge llvm, clang, lld, lldb, compiler-rt and libc++ r304149, and update
build glue.

Update llvm to trunk r290819 and resolve conflicts.

Update llvm to release_39 branch r276489, and resolve conflicts.

Update llvm to trunk r256633.

Merge llvm trunk r238337 from ^/vendor/llvm/dist, resolve conflicts, and
preserve our customizations, where necessary.

Merge llvm 3.6.0rc1 from ^/vendor/llvm/dist, merge clang 3.6.0rc1 from
^/vendor/clang/dist, resolve conflicts, and cleanup patches.

Merge llvm 3.5.0 release from ^/vendor/llvm/dist, resolve conflicts, and
preserve our customizations, where necessary.