This commit improves LLVM dialect's Mem2Reg interfaces to support
promotions of partial loads from larger memory slots. To support this,
the Mem2Reg interface methods are extended with additional data layout
parameters. The data layout is required to determine type sizes to
produce correct conversion sequences.

When moving an entire basic block after `InsertPoint`, currently we
check each instruction whether their users are dominated by
`InsertPoint`, however, this can be improved such that even a user is
not dominated by `InsertPoint`, as long as it appears as a subsequent
instruction in the same BB, it is safe to move.

This patch is similar to commit 751be2a0
that enhanced hoisting an entire BB, and this patch enhances sinking an
entire BB. Please refer to the added functionality in test case
`llvm/unittests/Transforms/Utils/CodeMoverUtilsTest.cpp` that was not
supported without this patch.

This patch takes advantage of a recent NFC change that refactored
`EvaluateBinaryTypeTrait()` to accept `TypeSourceInfo` instead of
`QualType` c7db450e.
Before:
```
test2.cpp:105:55: error: variable length arrays are not supported in '__is_layout_compatible'
  105 |   static_assert(!__is_layout_compatible(int[n], int[n]));
      |                                                       ^
test2.cpp:125:76: error: incomplete type 'CStructIncomplete' where a complete type is required
  125 |   static_assert(__is_layout_compatible(CStructIncomplete, CStructIncomplete));
      |                                                                            ^
``` 
After:
```
test2.cpp:105:41: error: variable length arrays are not supported in '__is_layout_compatible'
  105 |   static_assert(!__is_layout_compatible(int[n], int[n]));
      |                                         ^
test2.cpp:125:40: error: incomplete type 'CStructIncomplete' where a complete type is required
  125 |   static_assert(__is_layout_compatible(CStructIncomplete, CStructIncomplete));
      |                                        ^
```

Closes #86694

Copy `nneg` flag when building `UINT_TO_FP` from `uitofp` and use
`nneg` flag in the one place we transform `UINT_TO_FP` -> `SINT_TO_FP`
if the operand is non-negative.

Reverts llvm/llvm-project#85890

This fails in full build mode:

https://lab.llvm.org/buildbot/#/builders/163/builds/54478/steps/4/logs/stdio

Improvements include
* Enable `ListeningSocket::accept` to timeout after a specified amount
of time or block indefinitely
* Enable `ListeningSocket::createUnix` to handle instances where the
target socket address already exists and differentiate between
situations where the existing file does and does not already have a
bound socket
* Doxygen comments

Functionality added for the module build daemon

---------

Co-authored-by: Michael Spencer <bigcheesegs@gmail.com>

This PR is to work on the issue #85275

This is helpful to reduce calls of `RISCVRVC::compress` in #77337.

Reviewers: asb, lukel97, topperc

Reviewed By: topperc

Pull Request: https://github.com/llvm/llvm-project/pull/88120

Fixes #87907.

Also fix unit tests and reformat polly.

Fixes #86550.

```
typedef long long t67 __attribute__((aligned (4)));
struct s67 {
  int a;
  t67 b;
};
void f67(struct s67 x) {
}
```
When classify:
a: Lo = Integer, Hi = NoClass
b: Lo = Integer, Hi = NoClass
struct S: Lo = Integer, Hi = NoClass

```
define dso_local void @f67(i64 %x.coerce) {
```
In this case, only one i64 register is used when the structure parameter
is transferred, which is obviously incorrect.So we need to treat the
split case specially. fix
https://github.com/llvm/llvm-project/issues/85387.

MSVC doesn't support generating __vectorcall calls in Arm64EC mode, but
it does treat it as a distinct type. The Microsoft STL depends on this
functionality. (Not sure if this is intentional.) Add support for
parsing the same way as MSVC, and add some checks to ensure we don't try
to actually generate code.

The error handling in CodeGen is ugly, but I can't think of a better way
to do it.

This patch addresses the (performance )suggestions by checkcpp static
analyzer for couple of files. Here we use const reference for the
suggested function arguments.
Fixes #82263.

Fixes compiling windows.h using clang's intrin.h.

on apple-linux

fix the CI

This patch resolve TODO written in commit:
https://github.com/llvm/llvm-project/commit/5909c678831f3a5c1669f6906f777d4ec4532fa1

Proof: https://alive2.llvm.org/ce/z/C3VNoR

This patch uses the argument type to infer the LMUL cost for the index
generation, add, and comparison.

as titled.

It has been incompatible since #87761

For 49561181.

Precommit tests for overflowing and saturating arithmetic intrinsics.

As noted when #82404 was pushed (canonicalizing `sitofp` -> `uitofp`),
different signedness on fp casts can have dramatic performance
implications on different backends.

So, it makes to create a reliable means for the backend to pick its
cast signedness if either are correct.

Further, this allows us to start canonicalizing `sitofp`- > `uitofp`
which may easy middle end analysis.

Closes #86141

The HUGE definition collides with the HUGE macro from math.h. Unlike the
fix in 3149c934 (#84478) (largely reverted in f95710c7), add
another #undef HUGE since there is no practical way to make FreeBSD's
headers not define HUGE and still define XSI interfaces such as isascii
or strnlen.

Update comments above `#undef HUGE` instances to reflect the fact that
all major BSD versions (I checked DragonFly, FreeBSD, NetBSD, and
OpenBSD) leak the HUGE macro from math.h to various degrees.

Fixes #86038

This fixes https://github.com/llvm/llvm-project/issues/87324.

We haven't been able to come up with a minimal reproducer but we can
reliabely avoid this failure with the following fix. Prior to the
GetGlobalLowLevelAllocator change, the old LowLevelAllocator aquired a
lock associated with it preventing that specific allocator from being
accessed at the same time by many threads. With the
GetGlobalLowLevelAllocator change, I had accidentally replaced it but
not taken into account the lock, so we can have a data race if the
allocator is used at any point while a thread is being created. The
global allocator can be used for flag parsing or registering asan
globals.

A few verification checks need to happen until all AST's have been
traversed, specifically for zippered framework checking. To keep source
location until that time valid, hold onto to references of
FrontendRecords + SourceManager.

Revert "[Flang] [OpenMP] [Semantics] [MLIR] [Lowering] Add lowering support for IS_DEVICE_PTR and HAS_DEVICE_ADDR clauses on OMP TARGET directive." (#88198)

Reverts llvm/llvm-project#74187

to make it clear whether .debug_names should be added.
And include llvm/ADT/STLFunctionalExtras.h for IWYU.

Restructures the cloning slightly to perform all cloning for each
allocation separately. The prior algorithm would sometimes miss cloning
opportunities in cases where trimmed cold contexts partially overlapped
with longer contexts for different allocations.

Most of the change is isolated to the helpers that move edges to new or
existing clones, which now support moving a subset of context ids.

Fixes #58813

Summary:
These entires are generic for offloading with the new driver now. Having
the `omp` prefix was a historical artifact and is confusing when used
for CUDA. This patch just renames them for now, future patches will
rework the binary format to make it more common.

Proof: https://alive2.llvm.org/ce/z/m3xoo_

Closes #87734