Changes

[NFC] Minor cleanup for ValueHandle code.

Based on feedback in https://reviews.llvm.org/D93433.

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D94238

[mlir] Add an interface for Cast-Like operations

A cast-like operation is one that converts from a set of input types to a set of output types. The arity of the inputs may be from 0-N, whereas the arity of the outputs may be anything from 1-N. Cast-like operations are removable in cases where they produce a "no-op", i.e when the input types and output types match 1-1.

Differential Revision: https://reviews.llvm.org/D94831

[mlir] Add a new builtin `unrealized_conversion_cast` operation

An `unrealized_conversion_cast` operation represents an unrealized conversion
from one set of types to another, that is used to enable the inter-mixing of
different type systems. This operation should not be attributed any special
representational or execution semantics, and is generally only intended to be
used to satisfy the temporary intermixing of type systems during the conversion
of one type system to another.

This operation was discussed in the following RFC(and ODM):

https://llvm.discourse.group/t/open-meeting-1-14-dialect-conversion-and-type-conversion-the-question-of-cast-operations/

Differential Revision: https://reviews.llvm.org/D94832

[mlir] Make MLIRContext::getOrLoadDialect(StringRef, TypeID, ...) public

Having this function in a public scope is helpful to register dialects that are
defined at runtime, and thus that need a runtime-defined TypeID.

Also, a similar function in DialectRegistry, insert(TypeID, StringRef, ...), has
a public scope.

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D95091

[mlir][OpFormatGen] Fix incorrect kind used for RegionsDirective

I attempted to write a test case for this, but the situations in which the kind is used for RegionDirective and ResultsDirective have zero overlap; meaning that there isn't a situation in which sharing the kind creates a conflict.

Differential Revision: https://reviews.llvm.org/D94988

[DAGCombiner] Precommit test case for D95086

This is the test case for D95086 with worse result.

Differential Revision: https://reviews.llvm.org/D95103

[Clang][OpenMP] Use `clang_cc1` test for `declare_target_device_only_compilation.cpp`

Use `clang_cc1` test for `declare_target_device_only_compilation.cpp`

Reviewed By: echristo

Differential Revision: https://reviews.llvm.org/D95089

[lld-macho] Add dependency on ObjCARC to fix shared build

Fix a bug with setting breakpoints on C++11 inline initialization statements.

If they occurred before the constructor that used them, we would refuse to
set the breakpoint because we thought they were crossing function boundaries.

Differential Revision: https://reviews.llvm.org/D94846

[MSan] Move origins for overlapped memory transfer

Reviewed-by: eugenis

Differential Revision: https://reviews.llvm.org/D94572

Use CXX_SOURCES and point to the right source file.

Copy paste error, but the test still built on macOS.  Weird.
It failed on debian linux with an error about -fno-limit-debug-info
not being a supported flag???  Not sure how this goof would cause
that error, but let's see if it did...

[dsymutil] Compare object modification times using second precision

The modification time in the debug map is expressed using second
precision, while the modification time returned by the filesystem could
be more precise. Avoid spurious warnings about timestamp mismatches by
truncating the modification time reported by the system to seconds.

[RISCV] Use update_llc_test_checks.py to regenerate check lines in vleff-rv32.ll and vleff-rv64.ll.

This should minimize change in a future patch.

[lldb] Upstream eCore_arm_arm64e enum value in ArchSpec

Upstream the eCore_arm_arm64e enum value in ArchSpec. All the other
arm64e triple changes already landed in LLVM.

Differential revision: https://reviews.llvm.org/D95110

[RISCV] Implement vsseg intrinsics.

Define vsseg intrinsics and pseudo instructions. Lower vsseg intrinsics
to pseudo instructions in RISCVDAGToDAGISel.

Differential Revision: https://reviews.llvm.org/D94688

[RISCV] Implement vlsseg intrinsics.

Define vlsseg intrinsics and pseudo instructions. Lower vlsseg intrinsics
to pseudo instructions in RISCVDAGToDAGISel.

Differential Revision: https://reviews.llvm.org/D94763

[RISCV] Implement vssseg intrinsics.

Define vlsseg intrinsics and pseudo instructions. Lower vlsseg
intrinsics to pseudo instructions in RISCVDAGToDAGISel.

Differential Revision: https://reviews.llvm.org/D94863

[X86] Add experimental option to separately tune alignment of innermost loops

We already have an experimental option to tune loop alignment. Its impact
is very wide (and there is a suspicion that it's not always profitable). We want
to have something more narrow to play with. This patch adds similar option that
overrides preferred alignment for innermost loops. This is for experimental
purposes, default values do not change the existing behavior.

Differential Revision: https://reviews.llvm.org/D94895
Reviewed By: pengfei

[llvm] Construct SmallVector with iterator ranges (NFC)

[Transforms] Use llvm::append_range (NFC)

[llvm] Use hasSingleElement (NFC)

[IndirectFunctions] Skip propagating attributes to address taken functions

In case of indirect calls or address taken functions,
skip propagating any attributes to them. We just
propagate features to such functions.

Reviewed By: rampitec

Differential Revision: https://reviews.llvm.org/D94585

[yaml2obj/obj2yaml] - Improve dumping/creating of ELF versioning sections.

This makes the following improvements.

For `SHT_GNU_versym`:
 * yaml2obj: set `sh_link` to index of `.dynsym` section automatically.
For `SHT_GNU_verdef`:
 * yaml2obj: set `sh_link` to index of `.dynstr` section automatically.
 * yaml2obj: set `sh_info` field automatically.
 * obj2yaml: don't dump the `Info` field when its value matches the number of version definitions.
For `SHT_GNU_verneed`:
 * yaml2obj: set `sh_link` to index of `.dynstr` section automatically.
 * yaml2obj: set `sh_info` field automatically.
 * obj2yaml: don't dump the `Info` field when its value matches the number of version dependencies.

Also, simplifies few test cases.

Differential revision: https://reviews.llvm.org/D94956

[X86][AMX] Fix tile config register spill issue.

Previous code build the model that tile config register is the user of
each AMX instruction. There is a problem for the tile config register
spill. When across function, the ldtilecfg instruction may be inserted
on each AMX instruction which use tile config register. This cause all
tile data register clobber.
To fix this issue, we remove the model of tile config register. We
analyze the regmask of call instruction and insert ldtilecfg if there is
any tile data register live across the call. Inserting the sttilecfg
before the call is unneccessary, because the tile config doesn't change
and we can just reload the config.
Besides we also need check tile config register interference. Since we
don't model the config register we should check interference from the
ldtilecfg to each tile data register def.
             ldtilecfg
             /       \
            BB1      BB2
            /         \
           call       BB3
           /           \
       %1=tileload   %2=tilezero
We can start from the instruction of each tile def, and backward to
ldtilecfg. If there is any call instruction, and tile data register is
not preserved, we should insert ldtilecfg after the call instruction.

Differential Revision: https://reviews.llvm.org/D94155

[llvm-nm][ELF] - Make -D display symbol versions.

This fixes https://bugs.llvm.org/show_bug.cgi?id=48670.

Since binutils 2.35, nm -D displays symbol versions by default.
This patch teaches llvm-nm to do the same.

Differential revision: https://reviews.llvm.org/D94907

MCDwarf: Delete uneeded parameter

And change signature

[mlir] Remove complex ops from Standard dialect.

`complex` dialect should be used instead.
https://llvm.discourse.group/t/rfc-split-the-complex-dialect-from-std/2496/2

Differential Revision: https://reviews.llvm.org/D95077

[LoopUnswitch] Implement first version of partial unswitching.

This patch applies the idea from D93734 to LoopUnswitch.

It adds support for unswitching on conditions that are only
invariant along certain paths through a loop.

In particular, it targets conditions in the loop header that
depend on values loaded from memory. If either path from
the true or false successor through the loop does not modify
memory, perform partial loop unswitching.

That is, duplicate the instructions feeding the condition in the pre-header.
Then unswitch on the duplicated condition. The condition is now known
in the unswitched version for the 'invariant' path through the original loop.

On caveat of this approach is that one of the loops created can be partially
unswitched again. To avoid this behavior, `llvm.loop.unswitch.partial.disable`
metadata is added to the unswitched loops, to avoid subsequent partial
unswitching.

If that's the approach to go, I can move the code handling the metadata kind
into separate functions.

This increases the cases we unswitch quite a bit in SPEC2006/SPEC2000 &
MultiSource. It also allows us to eliminate a dead loop in SPEC2017's omnetpp

```
Tests: 236
Same hash: 170 (filtered out)
Remaining: 66
Metric: loop-unswitch.NumBranches

Program                                        base   patch  diff
 test-suite...000/255.vortex/255.vortex.test     2.00  23.00 1050.0%
 test-suite...T2006/401.bzip2/401.bzip2.test     7.00  55.00 685.7%
 test-suite :: External/Nurbs/nurbs.test         5.00  26.00 420.0%
 test-suite...s-C/unix-smail/unix-smail.test     1.00   3.00 200.0%
 test-suite.../Prolangs-C++/ocean/ocean.test     1.00   3.00 200.0%
 test-suite...tions/lambda-0.1.3/lambda.test     1.00   3.00 200.0%
 test-suite...yApps-C++/PENNANT/PENNANT.test     2.00   5.00 150.0%
 test-suite...marks/Ptrdist/yacr2/yacr2.test     1.00   2.00 100.0%
 test-suite...lications/viterbi/viterbi.test     1.00   2.00 100.0%
 test-suite...plications/d/make_dparser.test    12.00  24.00 100.0%
 test-suite...CFP2006/433.milc/433.milc.test    14.00  27.00 92.9%
 test-suite.../Applications/lemon/lemon.test     7.00  12.00 71.4%
 test-suite...ce/Applications/Burg/burg.test     6.00  10.00 66.7%
 test-suite...T2006/473.astar/473.astar.test    16.00  26.00 62.5%
 test-suite...marks/7zip/7zip-benchmark.test    78.00 121.00 55.1%
```

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D93764

[clangd] Fix a missing override keyword, NFC.

Revert "[X86][AMX] Fix tile config register spill issue."

This reverts commit 20013d02f3352a88d0838eed349abc9a2b0e9cc0.