Summary:
  If implicitarg_ptr intrinsic is not used, set implicit kernarg size to 0, otherwise
set it to 256 bytes for code object version 5 (and beyond).

Reviewers: arsenm

Differential Revision: https://reviews.llvm.org/D123262

rGa3b8695bf592 enabled this for znver3, but AMD SoG, Agner and uops.info all agree that even znver1 has a fast per-lane shuffle op (VPSHUFB), but cross-lane shuffles seem to be slow (PERMPS etc.)

Fixes #44140

Differential Revision: https://reviews.llvm.org/D123306

- isValid: FileManager only ever returns valid FileEntries (see next point)

- construction from outside FileManager (both FileEntry and DirectoryEntry).
  It's not possible to create a useful FileEntry this way, there are no setters.
  This was only used in FileEntryTest, added a friend to enable this.
  A real constructor is cleaner but requires larger changes to FileManager.

Differential Revision: https://reviews.llvm.org/D123197

In several cases, a doc is being generated from a .td file that includes
files containing other dialects. Specify the dialect for which the
documentation is being generated explicitly.

Fixes https://github.com/llvm/llvm-project/issues/51188.

Explicitly test the nounwind/willreturn combinations.

[InstCombine] SimplifyDemandedUseBits - allow and(srem(X,Pow2),C) -> and(X,C) to work on vector types

Replace m_ConstantInt with m_APInt to match uniform (no-undef) vector remainder amounts.

Subtraction was previously implemented recursively. This refactors it to be
non-recursive to avoid issues with potential stack overflows.

Reviewed By: Groverkss

Differential Revision: https://reviews.llvm.org/D123248

Differential Revision: https://reviews.llvm.org/D123081

GCC 14 warns about these.

Reviewed By: ABataev

Differential Revision: https://reviews.llvm.org/D121047

This reverts commit 2aca33ba.
Broke tests on several bots, see comments on https://reviews.llvm.org/D120305

Added the following helpers:

    depctr_hold_cnt(...)
    depctr_sa_sdst(...)
    depctr_va_vdst(...)
    depctr_va_sdst(...)
    depctr_va_ssrc(...)
    depctr_va_vcc(...)
    depctr_vm_vsrc(...)

Differential Revision: https://reviews.llvm.org/D123022

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D122577

[InstCombine] SimplifyDemandedUseBits - add TODO to remove shl node if we only demand known sign bits of the shift source

Similar to what we already perform for ashr/lshr

This is a lshr equivalent to D122340 - if we don't demand any of the additional sign bits introduced by the ashr, the lshr can be treated as an ashr and we can remove the shift entirely if we only demand already known sign bits.

Another step towards PR21929

https://alive2.llvm.org/ce/z/6f3kjq

Differential Revision: https://reviews.llvm.org/D123118

Reviewed By: var-const, Mordante, ldionne, #libc

Spies: tcanens, libcxx-commits, mgorny

Differential Revision: https://reviews.llvm.org/D121523

Our compact unwind handling code currently has some logic to locate a
symbol at a given offset in an InputSection. The EH frame code will need
to do something similar, so let's factor out the code.

Reviewed By: #lld-macho, thakis

Differential Revision: https://reviews.llvm.org/D123301

At the moment ZN2Tuning is just a copy of ZNTuning, but we should try to keep a clean inheritance.

Internal symbol mangling is implementation-defined.  We do not mangle
any module attachment, and this adds a test to verify that.

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D123220

clang may throw the following warning:
include/clang/AST/DeclarationName.h:210:52: error: arithmetic between
different enumeration types ('clang::DeclarationName::StoredNameKind'
and 'clang::detail::DeclarationNameExtra::ExtraKind') is deprecated
when flags -Werror,-Wdeprecated-enum-enum-conversion are on.

This adds the `addEnumValues()` helper function to STLExtras.h to hide
the details of adding enumeration values together from two different
enumerations.

This matches ld64, and makes dsymutil work better with lld's output.
Fixes PR54783, see there for details.

Reduces time needed to run dsymutil on Chromium Framework from 8m30s
(which is already down from 26 min with D123218) to 6m30s and removes
many lines of "could not find object file symbol for symbol" from dsymutil output
(previously: several MB of those messages, now dsymutil is completely silent).

Differential Revision: https://reviews.llvm.org/D123252

There are `constexpr` versions for the different `__invoke` functions, which seem to be identical other than begin `constexpr` since C++11 instead of being `constexpr` since C++20.

Reviewed By: ldionne, #libc

Spies: libcxx-commits

Differential Revision: https://reviews.llvm.org/D123003

This was accidentally caught in an automated replacement. This
test is testing the -opaque-pointers flag itself, so we shouldn't
add -no-opaque-pointers here (though it doesn't hurt either).

Also drop the line testing the default, as the default is now
determined by a cmake option.

clang to emit DWARF information for global alias variable as
DW_TAG_imported_declaration. This change also handles nested
(recursive) imported declarations.

Reviewed by: dblaikie, aprantl

Differential Revision: https://reviews.llvm.org/D120989

This change removes a lot of redundant strconcat usings.

[bugpoint] ReduceCrashingFunctions::TestFuncs - fix dereference of null point static analyzer warning

Alias.getAliaseeObject() shouldn't be null, do use dyn_cast instead of dyn_cast_or_null

Also, remove redundant `else if (!F)` test - that is always true at the point in the if-else chain

The existing code wasn't getting the subtarget info from the fragment,
so the current status of RVC would be ignored. This would cause a crash
for the new test case when the target then reported it couldn't write
the requested number of code alignment bytes.

Differential Revision: https://reviews.llvm.org/D122236

array index type.

This adds the flag to more tests that were not caught by the
mass-migration in 532dc62b.

In soft ABI, floating num is passing in GPRs. So we need support
bitcovert from double to Hi and Lo GPRs and vice versa