MCInst is primarily used in local variables and MCRelaxableFragment
(mostly JMP/JCC for x86). Reducing the inline element count can make
MCRelaxableFragment smaller, potentially leading to a lower peak RSS.

When compiling sqlite3.c, x86-64 has the largest maximum numOperands.

aarch64: 5; ppc64: 6; riscv64: 3; s390x: 6; x86-64: 8

Here is the frequency table for x86-64:

max getNumOperands: 8
0: 676
1: 37892
2: 84046
3: 26767
4: 1640
5: 1222
6: 80794
7: 768
8: 22

Pull Request: https://github.com/llvm/llvm-project/pull/94913

Make `sym_name` an inherent attr in GPUModuleOp so that it doesn't show
in the discardable attributes.
The change is safe as the attribute is always expected to be present.

This implements the throwing overload and the exception classes throw by
this overload.

Implements parts of:
- P0355 Extending chrono to Calendars and Time Zones

VTableNamePtr and CompressedVTableNamesLen are always used together to
create a StringRef in getSymtab.

We can create the StringRef ahead of time in readHeader.  This way,
IndexedInstrProfReader becomes a tiny bit simpler with fewer member
variables.  Also, StringRef default-constructs itself with its Data
and Length set to nullptr and 0, respectively, which is exactly what
we need.

[Clang][OpenMP] throw compilation error instead of crash in Stmt::OMPScopeDirectiveClass case (#77535) (#84135)

Fix #77535, Change unstable assertion into compilation error, and add a
test for it.

Fully qualify all namespaces appearing in `GPUTargetAttrInterface` and
`OffloadingLLVMTranslationAttrInterface`. If they're not fully qualified
then out-of-tree dialects might encounter name resolution errors.

Vectors are supported for fp operations now, so remove the assert. The
supported type/operation combinations are best left for the verifier.
Avoids regression in future commit that starts treating some vector
cases as legal.

Closes #94897.

Remove unneeded parameters or sync into class if they are only
ever used with one value.

We can implicitly convert RemainingVDs to an ArrayRef.  Note that
RemainingVDs is of type SmallVector<InstrProfValueData, 24>.

Implements parts of:
- P0355 Extending chrono to Calendars and Time Zones

This adds the alternate mnemonics for movrz and movrnz.

Reviewers: s-barannikov, jrtc27, brad0, rorth

Reviewed By: s-barannikov

Pull Request: https://github.com/llvm/llvm-project/pull/94252

If the Count passed into writeNopData is not a multiple of four,
add a little amount of zeros before writing the NOP stream.
This makes it match the behavior of GNU binutils.

Reviewers: brad0, rorth, s-barannikov, jrtc27

Reviewed By: s-barannikov

Pull Request: https://github.com/llvm/llvm-project/pull/94251

This adds support for `prefetcha` instruction for prefetching from
alternate address spaces.

Reviewers: jrtc27, brad0, rorth, s-barannikov

Reviewed By: s-barannikov

Pull Request: https://github.com/llvm/llvm-project/pull/94250

This adds named tag constants (such as `#one_write` and `#one_read`)
for the prefetch instruction.

Reviewers: jrtc27, rorth, brad0, s-barannikov

Reviewed By: s-barannikov

Pull Request: https://github.com/llvm/llvm-project/pull/94249

Swap out range metadata to range attribute for calls to be able to
deprecate range metadata on calls in the future.

Handle binary ops and a few other instructions in onlyFirstPartUsed;
they only use the first part if they themselves only have their first
part used.

This moves the combine of fdiv by constant to fmul out of an
'if (Options.UnsafeFPMath || Flags.hasAllowReciprocal()' block,
so that it triggers if the divide is exact. An extra check for
Recip.isDenormal() is added as multiple places make reference
to it being unsafe or slow on certain platforms.

[DAG] FoldConstantArithmetic - allow binop folding to work with differing bitcasted constants (#94863)

We currently only constant fold binop(bitcast(c1),bitcast(c2)) if c1 and c2 are both bitcasted and from the same type.

This patch relaxes this assumption to allow the constant build vector to originate from different types (and allow cases where only one operand was bitcasted).

We still ensure we bitcast back to one of the original types if both operand were bitcasted (we assume that if we have a non-bitcasted constant then its legal to keep using that type).

Ignore implicit pointer conversions that are part of a cast expression

Closes #93959

Add StrictCStandardCompliance and StrictCppStandardCompliance options
that default to true.

Closes #83732

Ignore implicit declarations and defaulted functions. Helps with issues
in generated code like, C++
spaceship operator.

Closes #93409

Based on feedback on #94863

Do not emit warnings for non-math operators.

Closes #92516

Really perform the conversion always if the flag is set and don't make
it dependent on whether we're checking the result for initialization.

This adds %set_softint and %clear_softint alias for %asr20 and %asr21
as defined in JPS1.

Reviewers: jrtc27, brad0, s-barannikov, rorth

Reviewed By: s-barannikov

Pull Request: https://github.com/llvm/llvm-project/pull/94247

This adds support for GNU %uhi and %ulo extensions.
Those resolve to the same relocations as %hh and %hm.

Reviewers:
cyndyishida, dcci, brad0, jrtc27, aaupov, Endilll, rorth, maksfb, #reviewers-libcxxabi, s-barannikov, rafaelauler, ayermolo, #reviewers-libunwind, #reviewers-libcxx, daniel-grumberg, tbaederr

Reviewed By: s-barannikov

Pull Request: https://github.com/llvm/llvm-project/pull/94246

Transform `addc imm, %rs, %rd` into `addc %rs, imm, %rd`.
This is used in some GNU and Linux code.

Reviewers: s-barannikov, rorth, jrtc27, brad0

Reviewed By: s-barannikov

Pull Request: https://github.com/llvm/llvm-project/pull/94245

Decrease the uses of getFragmentList() to make it easier to change the
fragment list representation.