Changes

[libc++] Fix spurious test failure in -fno-exceptions

[clangd] Improve bad-RPC-payload error messages slightly

[CGProfile] don't emit cgprofile entry if called function is dllimport

Differential Revision: https://reviews.llvm.org/D88127

Explicitly specify CMAKE_AR in WinMsvc.cmake

As of cmake 3.18, cmake changes how it searches for compilers for
Windows (see
https://gitlab.kitware.com/cmake/cmake/-/commit/55196a1440e26917d40e6a7a3eb8d9fb323fa657)
and now finds llvm-ar instead of llvm-lib as CMAKE_AR. This explicitly
specifies CMAKE_AR as llvm-lib so the correct program is found.

Reviewed By: smeenai

Differential Revision: https://reviews.llvm.org/D88176

Utility: ignore OS version on non-Darwin targets in `ArchSpec`

The OS version field is generally not very helpful for non-Darwin
targets.  On Linux, it identifies the kernel version which moves
out-of-sync with the userspace.  On Windows, this field actually ends up
corresponding to the Visual Studio toolset version instead of the OS
version.  Consider non-Darwin targets without an OS version to be fully
specified.

Differential Revision: https://reviews.llvm.org/D88181
Reviewed By: Jonas Devlieghere, Dave Lee

[X86] Add TDX instructions.

For more details about these instructions, please refer to the latest TDX document: https://software.intel.com/content/www/us/en/develop/articles/intel-trust-domain-extensions.html

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D88006

[X86] Parse data32 call in .code16 as CALLpcrel32

Used by kexec-tools (PR46942)
In GNU as, tc-i386.c:output_jump uses 4-byte immediate if a data32 prefix is present.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D88137

Revert "[NewPM] Add callbacks to PassBuilder to run before/after parsing a pass"

This reverts commit 111aa4e36614d9a056cf5040d4d7bbfddeb9ebb2.

[AMDGPU] Consider all SGPR uses as unique in constant bus verify

Fix the verifier so that overlapping SGPR operands are counted
independently.  We cannot assume that overlapping SGPR accesses
only count as a single constant bus use.
The exception is implicit uses which do not add to constant bus
usage (only) when overlapping.

Reviewed By: rampitec

Differential Revision: https://reviews.llvm.org/D87748

[NFC] Remove unnecessary default constructors

[GlobalISel][AMDGPU] Lower G_SMULH/G_UMULH

Reviewed By: arsenm, foad

Differential Revision: https://reviews.llvm.org/D85653

[lld-macho] Initial support for common symbols

On Unix, it is traditionally allowed to write variable definitions without
initialization expressions (such as "int foo;") to header files. These are
called tentative definitions.

The compiler creates common symbols when it sees tentative definitions. When
linking the final binary, if there are remaining common symbols after name
resolution is complete, the linker converts them to regular defined symbols in
a `__common` section.

This diff implements most of that functionality, though we do not yet handle
the case where there are both common and non-common definitions of the same
symbol.

Reviewed By: #lld-macho, gkm

Differential Revision: https://reviews.llvm.org/D86909

[lld-macho] Implement and test resolution of common symbols

Handle the case where there are both common and non-common definitions
of the same symbol. Add a bunch of tests to ensure compatibility with ld64.

Reviewed By: #lld-macho, gkm

Differential Revision: https://reviews.llvm.org/D86910

[lld-macho] Emit indirect symbol table

Makes it a little easier to read objdump's disassembly.

Reviewed By: #lld-macho, gkm

Differential Revision: https://reviews.llvm.org/D87178

[lld-macho] Ignore `-mllvm` and its argument

Test Plan:

Reviewed By: #lld-macho, compnerd, MaskRay

Differential Revision: https://reviews.llvm.org/D87803

[lld-macho] Support -weak_lx, -weak_library, -weak_framework

They cause their corresponding libraries / frameworks to be loaded via
`LC_LOAD_WEAK_DYLIB` instead of `LC_LOAD_DYLIB`.

Reviewed By: #lld-macho, gkm

Differential Revision: https://reviews.llvm.org/D87929

[lld-macho][NFC] Refactor syslibroot / library path lookup

* Move computation of systemLibraryRoots into a separate function, so we
  can add more functionality to it without things becoming unwieldy
* Have `getSearchPaths` and related functions return by value instead of
  by output parameter. NRVO should ensure that performance is unaffected.

Reviewed By: #lld-macho, smeenai

Differential Revision: https://reviews.llvm.org/D87959

[lld-macho][NFC] Make `!= nullptr` implicit

[IRSim] Adding structural comparison to IRSimilarityCandidate.

Just because sequences of instructions are similar to one another,
doesn't mean they are doing the same thing.

This introduces a structural check for the IRSimilarityCandidate that
compares two IRSimilarityCandidates against one another, and in each
instruction creates a mapping between the operands and results, or
checks that the existing mapping is valid.  If this check passes, it
means we have structurally similar IRSimilarityCandidates.

Tests for whether the candidates are found in
unittests/Analysis/IRSimilarityIdentifierTest.cpp.

Revert "[IRSim] Adding structural comparison to IRSimilarityCandidate."

This reverts commit b27db2bb68163fa5bcb4a8f631a305eb5adb44e5.

[IRSim] Adding structural comparison to IRSimilarityCandidate.

Just because sequences of instructions are similar to one another,
doesn't mean they are doing the same thing.

This introduces a structural check for the IRSimilarityCandidate that
compares two IRSimilarityCandidates against one another, and in each
instruction creates a mapping between the operands and results, or
checks that the existing mapping is valid.  If this check passes, it
means we have structurally similar IRSimilarityCandidates.

Tests for whether the candidates are found in
unittests/Analysis/IRSimilarityIdentifierTest.cpp.

Recommit of: b27db2bb68163fa5bcb4a8f631a305eb5adb44e5 for Differential
URL.

Differential Revision: https://reviews.llvm.org/D86971

[Power10]  Implement custom codegen for the vec_replace_elt and vec_replace_unaligned builtins.

This patch implements custom codegen for the vec_replace_elt and
vec_replace_unaligned builtins.

These builtins map to the @llvm.ppc.altivec.vinsw and @llvm.ppc.altivec.vinsd
intrinsics depending on the arguments. The main motivation for doing custom
codegen for these intrinsics is because there are float and double versions of
the builtin. Normally, the converting the float to an integer would be done via
fptoui in the IR. This is incorrect as fptoui truncates the value and we must
ensure the value is not truncated. Therefore, we provide custom codegen to utilize
bitcast instead as bitcasts do not truncate.

Differential Revision: https://reviews.llvm.org/D83500

[dwarfdump] Warn for tags with DW_CHILDREN_yes but no children.

Flag DIEs that have DW_CHILDREN_yes set in their abbreviation but don't
actually have any children.

rdar://59809554

Differential revision: https://reviews.llvm.org/D88048

DebugInfo: Filter DWARFv5 TUs out of the debug_info unit list when CUs requested

Since DWARFv5 places TUs in debug_info, some of DWARFContext's APIs have
become a bit erroneous, including TUs in the CU list by accident.
Correct that by providing compile_units (& dwo_compile_units) that
filter out the type units from the debug_info units.

Differential Revision: https://reviews.llvm.org/D87935

[IRSim][NFC] Removing warning from IRSimilarityIdentifier

[DWARFYAML] Make the ExtLen field of extended opcodes optional.

This patch makes the 'ExtLen' field of extended opcodes optional. We
don't need to manually calculate it in the future.

Reviewed By: jhenderson, MaskRay

Differential Revision: https://reviews.llvm.org/D88136

[IRSim] Adding a basic similarity identifier.

This takes the mapped instructions from the IRInstructionMapper, and
passes it to the Suffix Tree to find the repeated substrings.  Within
each set of repeated substrings, the IRSimilarityCandidates are compared
against one another for structure, and ensuring that the operands in the
instructions are used in the same way.  Each of these structurally
similarity IRSimilarityCandidates are contained in a SimilarityGroup.

Tests checking for identifying identity of structure, different
isomorphic structure, and different
nonisomoprhic structure are found in
unittests/Analysis/IRSimilarityIdentifierTest.cpp.

Differential Revision: https://reviews.llvm.org/D86972

Revert "[lld-macho] Implement and test resolution of common symbols"

This reverts commit cd7cb0c30305501982ba37b4905bb264b3539ad0.
Break lldb Arm build:
http://lab.llvm.org:8011/builders/lldb-arm-ubuntu/builds/4409

Revert "[lld-macho] Initial support for common symbols"

This reverts commit 63ace77962543f961f1d566dd1243b1fb37129ef.

Breaks LLDB Arm build:
http://lab.llvm.org:8011/builders/lldb-arm-ubuntu/builds/4409