Created using spr 1.3.4

[skip ci]

Created using spr 1.3.4

[skip ci]

ARM64EC varargs calls expect that x4 = sp at entry, special handling is
needed to ensure this with tail calls since they occur after the
epilogue and the x4 write happens before.

I tried going through AArch64MachineFrameLowering for this, hoping to
avoid creating the dummy object but this was the best I could do since
the stack info that uses isn't populated at this stage,
CreateFixedObject also explicitly forbids 0 sized objects.

- Sema::isSimpleTypeSpecifier return true for _Bool in c99 (currently
returns false for _Bool, regardless of C dialect). (Fixes #72203)
- replace the logic with a check for simple types and a proper check for
a valid keyword in the appropriate dialect

Co-authored-by: Carl Peto <CPeto@becrypt.com>

Check if program header addresses fall into the kernel space to detect a
Linux kernel binary on x86-64.

Delete opts::LinuxKernelMode and use BinaryContext::IsLinuxKernel
instead.

Closes https://github.com/llvm/llvm-project/issues/64144

Instead of checking for `nullptr` we need to ensure that `JobList` is
not empty to proceed

Keep the conversion target to allow for checking if the op is legal.

The dump_format_style.py script generates the clang-format style options
documentation.
There was an issue where the script could include spurious characters in
the output when run in windows. It appears that it wasn't defaulting to
the correct encoding when reading the input.
This has been addressed by explicitly setting the encoding when opening
the file.

Without this scanning will continue and later hit an assert that the
number of `RedirectingFileSystem`s matches the number of -ivfsoverlay
arguments.

The previous PR was not correct on the way to handle the negative value.
It is necessary to take the absolute value of the given real (or
imaginary) part to be multiplied with the sqrt part.

See: https://github.com/llvm/llvm-project/pull/76316

Add image_index to the list of intrinsic functions and add additional
check on its args in check-call.cpp. Add two semantics tests for
image_index.

The loader can usually handle an unaligned import dir chunk, but It's not
optimal and it's not what MSVC link.exe does.

Windows refuses to load ARM64X binaries with unaligned import directory.
aarch64 and arm64ec imports are shared in such binaries as much as
possible. As long as they use the same set of functions from given import
directory, both the directory and import addresses chunk are just shared.
When used set of functions differs, ARM64X dynamic relocations are used
to modify import dir to point to different names and import addresses for
its EC view. I suspect that the loader expects some alignment on ARM64X
dynamic relocation offset and may not be the case when relocated import
dir is not aligned.

This adds a missing CHECK-NOT directive for an existing test case.

`-ivfsoverlay` files are unused when building most modules. Enable
removing them by,
* adding a way to visit the filesystem tree with extensible RTTI to
  access each `RedirectingFileSystem`.
* Adding tracking to `RedirectingFileSystem` to record when it
  actually redirects a file access.
* Storing this information in each PCM.

Usage tracking is only enabled when iterating over the source manager
and affecting modulemaps. Here each path is stated to cause an access.
During scanning these stats all hit the cache.

I suspect this is a bug in linux 4.19, as the test passes as written on
my
linux 6.5 machine.

Let's revisit this after the build bots are upgraded.

Link: #80073

2.9.1 The trip count for all loops associated with the collapse clause must be
computable and invariant in all the loops.

This patch checks that loops part of a collapse nest does not depends on outer
loops induction variables.

The check is also applied to combined construct with a loop.

This patch dump the rewritten sub-expressions in `CXXDefaultArgExpr` and
`CXXDefaultInitExpr`.
This machinery is useful for checking whether the materialized
temporaries is lifetime-extended in the sub-AST of `CXXDefaultArgExpr`
(`CXXDefaultInitExpr` has not been lifetime extendend now).

Signed-off-by: yronglin <yronglin777@gmail.com>

We are not interested in nonpointers being added to.

TableEntry names are pointers into the string table section, and
accessing their
length requires a search for `\0`. However, 99% of the time we only need
to
compare the name against some other other, and such a comparison will
fail as
early as the first character.

This commit adds a method to the interface of TableEntry so that such a
comparison can be done without extracting the full name. It saves 10% in
the
time (1250ms -> 1100 ms) to evaluate the following expression.

```
lldb \
  --batch \
  -o "b CodeGenFunction::GenerateCode" \
  -o run \
  -o "expr Fn" \
  -- \
  clang++ -c -g test.cpp -o /dev/null &> output
```

fixes #79336

Co-authored-by: Sirui Mu <msrlancern@gmail.com>

32-bit ARMv6 with thumb doesn't support MULHS/MUL_LOHI as legal/custom
nodes during expansion which will cause fixed point multiplication of
_Accum types to fail with fixed point arithmetic. Prior to this, we just
happen to use fixed point multiplication on platforms that happen to
support these MULHS/MUL_LOHI.

This patch attempts to check if the multiplication can be done via
libcalls, which are provided by the arm runtime. These libcall attempts
are made elsewhere, so this patch refactors that libcall logic into its
own functions and the fixed point expansion calls and reuses that logic.

Fix #79283: `test/dfsan/custom.cpp` has undefined symbol linker errors
on glibc 2.38 due to lack of wrappers for `__isoc23_strtol` and
`__isoc23_scanf` family functions.

Implement these wrappers as aliases to existing wrappers, similar to
https://reviews.llvm.org/D158943 for other sanitizers.

`strtol` in a user program, whether or not `_ISOC2X_SOURCE` is defined,
uses the C23 semantics (`strtol("0b1", 0, 0)` => 1), when
`libclang_rt.dfsan.a` is built on glibc 2.38+.

Modify #77393 to clear shadow memory using `llvm.memset.*` when the size
is large, similar to `shouldUseBZeroPlusStoresToInitialize` in clang for
`-ftrivial-auto-var-init=`. The intrinsic, if lowered to libcall, will
use the msan interceptor.

The instruction selector lowers a `StoreInst` to multiple stores, not
utilizing `memset`. When the size is large (e.g.
`store { [100 x i32] } zeroinitializer, ptr %12, align 1`), the
generated code will be long (and `CodeGenPrepare::optimizeInst` will
even crash for a huge size).

```
// Test stack size
template <class T>
void DoNotOptimize(const T& var) { // deprecated by https://github.com/google/benchmark/pull/1493
  asm volatile("" : "+m"(const_cast<T&>(var)));
}

int main() {
  using LargeArray = std::array<int, 1000000>;
  auto large_stack = []() { DoNotOptimize(LargeArray()); };
  /////// CodeGenPrepare::optimizeInst triggers an assertion failure when creating an integer type with a bit width>2**23
  large_stack();
}
```

This reverts commit 0fa4463e.

Breaks buildbot https://lab.llvm.org/buildbot/#/builders/268/builds/7155

2.9.1 The trip count for all loops associated with the collapse clause
must be computable and invariant in all the loops.

This patch checks that iteration range of loops part of a collapse nest
does not depend on outer loops induction variables.

The check is also applied to combined construct with a loop.

The CFG orders the blocks of loop bodies before those of loop successors
(both numerically, and in the successor order of the loop condition
block). So, RPO necessarily reverses that order, placing the loop
successor *before* the loop body. For many analyses, particularly those
that converge to a fixpoint, this results in potentially significant
extra work, because loop successors will necessarily need to be
reconsidered once the algorithm has reached a fixpoint on the loop body.

This definition of CFG graph traits reverses the order of children, so
that loop bodies will come first in an RPO. Then, the algorithm can
fully evaluate the loop and only then consider successor blocks.

It appears that sys_epoll_pwait2 isn't always available, so we need to
add some sort of condition to enable it. This patch disables it until
that happens.

As per the FIXME, this cap never really served its purpose. This patch
simplifies to a single, caller-specified, absolute cap.

Previously we gave up immediately and just escaped.  Instead, skip to
the next close paren and see if we can continue parsing the next clause
instead.

The 'wait' clause is parsed the same way as the 'wait' construct, so
this jsut differs to that function.

This patch adds two new repetition modes to llvm-exegesis, particularly
loop and duplicate repetition modes of what I am terming the middle half
repetition mode. The middle half repetition mode essentially runs each
measurement twice, one with twice the number of iterations of the other.
These two measurements are then agregated by taking their difference.
This subtracts away any setup/overhead that is unrelated to the code in
the snippet, providing more accurate results.

Using this mode on a couple toy examples, I am able to get exact
(integer) throughput values on all of them in contrast to the default
duplicate/loop repetition modes which show a little bit of noise on the
snippet value.

[AMDGPU][AsmParser] Allow `v_writelane_b32` to use SGPR and M0 as source operands at the same time (#78827)

Currently the asm parser takes `v_writelane_b32 v1, s13, m0` as illegal
instruction for pre-gfx11 because it uses two constant buses while the
hardware
can only allow one. However, based on the comment of
`AMDGPUInstructionSelector::selectWritelane`,
it is allowed to have M0 as lane selector and a SGPR used as SRC0
because the
lane selector doesn't count as a use of constant bus. In fact, codegen
can already
generate this form, but this inconsistency is not exposed because the
validation
of constant bus limitation only happens when paring an assembly but we
don't have
a test case when both SGPR and M0 used as source operands for the
instruction.

rv32zbb-valid.s tests rv64 and rv32. rv32zbb-only-valid.s only tests rv32.

The rori tests in rv32zbb-only-valid.s produce the same result for rv32 and
rv64 so its better to test them in rv32zbb-valid.s.

Remove a now redundant test case from rv64zbb-valid.s.
Add a missing rori test with imm >= 32 to rv64zbkb-valid.s.

An extra int was copied.

The `total` parameter for the constructor for Progress was changed to a
std::optional in https://github.com/llvm/llvm-project/pull/77547. It was originally set to 1 to indicate non-determinisitic progress, but this commit changes this. First, `UINT64_MAX` will again be used for non-deterministic progress, and `Progress` now has a static variable set to this value so that we can use this instead of a magic number. 

The member variable `m_total` could be changed to a std::optional as
well, but this means that the `ProgressEventData::GetTotal()` (which is
used for the public API) would
either need to return a std::optional value or it would return some
specific integer to represent non-deterministic progress if `m_total` is
std::nullopt.

Summary:
This logic was wrong and accidentally appling to OpenCL.