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[LLD][COFF] Add support for custom DOS stub (#122561)

This change implements support for the /stub flag to align with MS
link.exe. This option is useful when a program needs to optimize the DOS
program that executes when the PE runs on DOS, avoiding the traditional
hardcoded DOS program in LLD.

[Clang] Fix warning for non std functions with name `infinity` (#123417)

Fix reporting diagnostic for non std functions that has the name
`infinity`

Fixes: #123231

[AMDGPU][True16][MC] true16 for v_cmp_xx_i/u16 (#122968)

A bulk commit of true16 support for v_cmp_xx_i/u16 instructions
including:

v_cmp_lt_i16
v_cmp_eq_i16
v_cmp_le_i16
v_cmp_gt_i16
v_cmp_ne_i16
v_cmp_ge_i16
v_cmp_lt_u16
v_cmp_eq_u16
v_cmp_le_u16
v_cmp_gt_u16
v_cmp_ne_u16
v_cmp_ge_u16

[flang][PPC] XFAIL unroll-loops on PPC (#123661)

xfail the following 2 test cases that are failing on PowerPC buildbots
`ppc64-flang-aix` and `ppc64le-flang-rhel-clang` due toPR #122906.
Defect opened:  #123668.

FAIL: Flang::unroll-loops.fir
FAIL: Flang::unroll-loops.f90

[libc++][chrono] implements UTC clock.

While implementing this feature and its associated LWG issues it turns out
- LWG3316 Correctly define epoch for utc_clock / utc_timepoint
only added non-normative wording to the standard.

Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
- P1361 Integration of chrono with text formatting
- LWG3359 <chrono> leap second support should allow for negative leap seconds

[libc++][chrono] implements UTC clock.

While implementing this feature and its associated LWG issues it turns out
- LWG3316 Correctly define epoch for utc_clock / utc_timepoint
only added non-normative wording to the standard.

Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
- P1361 Integration of chrono with text formatting
- LWG3359 <chrono> leap second support should allow for negative leap seconds

[libc++][chrono] implements UTC clock.

While implementing this feature and its associated LWG issues it turns out
- LWG3316 Correctly define epoch for utc_clock / utc_timepoint
only added non-normative wording to the standard.

Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
- P1361 Integration of chrono with text formatting
- LWG3359 <chrono> leap second support should allow for negative leap seconds

[Github] Add Agent Container Image (#123486)

This patch adds an agent container image on top of the normal CI
container image. They are the exact same except that the agent container
image also contains Github Runner binaries. I've split it into a
separate container as only one user of these images (the new premerge)
needs this binary installed, and it bloats the container image size
significantly (900MB->1.3GB or so).

[Github] Add Zlib at build time to CI container (#123489)

This patch adds zlib at build time to the CI container. This is needed
to make an lldb test pass that defaults to using the system lld if it is
not explicitly enabled in LLVM_ENABLE_PROJECTS.

Fixes #123479 (by fixing the proximal cause).

[libc++][chrono] implements UTC clock.

While implementing this feature and its associated LWG issues it turns out
- LWG3316 Correctly define epoch for utc_clock / utc_timepoint
only added non-normative wording to the standard.

Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
- P1361 Integration of chrono with text formatting
- LWG3359 <chrono> leap second support should allow for negative leap seconds

[libc++] Another _LIBCPP_NODEBUG fix

[libc++][chrono] implements UTC clock.

While implementing this feature and its associated LWG issues it turns out
- LWG3316 Correctly define epoch for utc_clock / utc_timepoint
only added non-normative wording to the standard.

Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
- P1361 Integration of chrono with text formatting
- LWG3359 <chrono> leap second support should allow for negative leap seconds

[LiveRegMatrix] Use MCRegUnit instead of MCRegister for register unit. NFC

MCRegister should be used for registers, not register units.

[LLVM] Update cmake and library layering maintainers (#120542)

Currently @chandlerc is listed as the maintainer for "CMake and library
layering", but he has not been active in that area in while.
Consequently, this patch updates the maintainers for CMake and
library layering to folks who are working more actively in these
areas.

See https://llvm.org/docs/DeveloperPolicy.html#maintainers for
context on the maintainers terminology.

[mlir] Add lowering of absi and fpowi to libdevice (#123644)

More concise version of #123422.

---------

Co-authored-by: William S. Moses <gh at wsmoses.com>

[flang][OpenMP] Don't try to privatize FORALL/DO CONCURRENT indices (#123341)

FORALL/DO CONCURRENT indices have predetermined private DSA (OpenMP 5.2
5.1.1).

As FORALL/DO CONCURRENT indices are defined in the construct itself, and
OpenMP
directives may not appear in it, they are already private and don't need
to be modified.

Fixes https://github.com/llvm/llvm-project/issues/100919
Fixes https://github.com/llvm/llvm-project/issues/120023
Fixes https://github.com/llvm/llvm-project/issues/123537

[libc++] Add missing _LIBCPP_NODEBUG on internal alias

[libc++][chrono] implements UTC clock.

While implementing this feature and its associated LWG issues it turns out
- LWG3316 Correctly define epoch for utc_clock / utc_timepoint
only added non-normative wording to the standard.

Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
- P1361 Integration of chrono with text formatting
- LWG3359 <chrono> leap second support should allow for negative leap seconds

Revert "[mlir] Link libraries that aren't included in libMLIR to libMLIR (#123477)"

This reverts commit af6616676fb7f9dd4898290ea684ee0c90f1701d.  It broke
builds with `-DBUILD_SHARED_LIBS=ON`.

[SystemZ] Add support for new cpu architecture - arch15

This patch adds support for the next-generation arch15
CPU architecture to the SystemZ backend.

This includes:
- Basic support for the new processor and its features.
- Detection of arch15 as host processor.
- Assembler/disassembler support for new instructions.
- Exploitation of new instructions for code generation.
- New vector (signed|unsigned|bool) __int128 data types.
- New LLVM intrinsics for certain new instructions.
- Support for low-level builtins mapped to new LLVM intrinsics.
- New high-level intrinsics in vecintrin.h.
- Indicate support by defining  __VEC__ == 10305.

Note: No currently available Z system supports the arch15
architecture.  Once new systems become available, the
official system name will be added as supported -march name.

[clang] Improve the documentation for the init_priority attribute (#123098)

The documentation wasn't very clear about whether ordering is controlled
within or across TUs, and same for dylibs. Clarify that, and also add
mentions for the state of support on Mach-O platforms.

[TableGen] Avoid repeated hash lookups (NFC) (#123562)

[MIRParser] Avoid repeated map lookups (NFC) (#123561)

[InstCombine] Avoid repeated hash lookups (NFC) (#123559)

Revert "[AMDGPU] Handle natively unsupported types in addrspace(7) lowering" (#123657)

Reverts llvm/llvm-project#110572

Seem to have broken a buildbot, not sure why
https://lab.llvm.org/buildbot/#/builders/108/builds/8346

[HipStdPar] Avoid repeated hash lookups (NFC) (#123558)

[CodeGen] Avoid repeated hash lookups (NFC) (#123557)

[memprof] Add simplify_type (NFC) (#123556)

IndexCall is a simple wrapper around:

  PointerUnion<CallsiteInfo *, AllocInfo *>

Now, because we don't have CastInfo for IndexCall, we would have to
use getBase like so:

  dyn_cast_if_present<CallsiteInfo *>(Call.getBase())

This patch adds simplify_type<IndexCall>, which in turn enables
CastInfo for IndexCall, so we can drop getBase like so::

  dyn_cast_if_present<CallsiteInfo *>(Call)

Rebase

Created using spr 1.3.5

[libc++][chrono] implements UTC clock.

While implementing this feature and its associated LWG issues it turns out
- LWG3316 Correctly define epoch for utc_clock / utc_timepoint
only added non-normative wording to the standard.

Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
- P1361 Integration of chrono with text formatting
- LWG3359 <chrono> leap second support should allow for negative leap seconds