Change AfterPlacementOperator to a boolean and deprecate SBPO_Never,
which meant never inserting a space except when after new/delete.

Fixes #78892.

So that it can be used by clang-format.

* Use APFloat conversion function instead of going through double to
check if fold results in information loss.
* Support folding vector constants.

This PR adds patterns to convert a sub-byte vector transpose into a
sequence of instructions that perform the transpose on i8 vector
elements. Whereas this rewrite may not lead to the absolute peak
performance, it should ensure correctness when dealing with sub-byte
transposes.

The read function wasn't properly unpoisoning its result under msan,
causing test failures downstream when I tried to roll it out. This patch
adds the msan unpoison call that fixes the issue.

Fix rst comment, add checks for recently implemented functions+macro.

We don't have an AMO instruction for Nand, so with the A extension we
use an LR/SC loop. If we have Zacas we can use a CAS loop instead.

According to the Zacas spec, a CAS loop scales to highly parallel
systems better than LR/SC.

This reverts commit a5a8cbb1.

The test being added by that commit still fails on the assertion that
Debugger::Initialize has been called more than once.

This reverts commit 209fe1f3.

The original commit failed to due an assertion failure in the unit test
`ProgressReportTest` that the commit added. The Debugger::Initialize()
function was called more than once which triggered the assertion, so
this commit calls that function under a `std::call_once`.

This partially reverts commit aa964f15
because it caused perf regressions in rccl due to drop of -mllvm
-amgpu-kernarg-preload-count=16 from the linker step. Potentially it
could cause similar regressions for other HIP apps using -mllvm options
with -fgpu-rdc.

Fixes: SWDEV-443345

This is a follow up to an item I noted in my submission comment for
e947f953. I don't have a real world example where this is triggering
unprofitably, but avoiding the transform when we estimate the loop to be
short running from profiling seems quite reasonable. It's also now come
up as a possibility in a regression twice in two days, so I'd like to
get this in to close out the possibility if nothing else.

The original review dropped the threshold for short trip count loops. I
will return to that in a separate review if this lands.

The purpose of m_being_created in these classes was to prevent
broadcasting an event related to these Breakpoints during the creation
of the breakpoint (i.e. in the constructor). In Breakpoint and
Watchpoint, m_being_created had no effect. That is to say, removing it
does not change behavior.
However, BreakpointLocation does still use m_being_created. In the
constructor, SetThreadID is called which does broadcast an event only if
`m_being_created` is false. Instead of having this logic be roundabout,
the constructor instead calls `SetThreadIDInternal`, which actually
changes the thread ID. `SetThreadID` also will call
`SetThreadIDInternal` in addition to broadcasting a changed event.

If we can't produce a large enough index vector in i8, we may need to legalize
the shuffle (via scalarization - which in turn gets lowered into stack usage).
This change makes two related changes:
* Deferring legalization until we actually need to generate the vrgather
  instruction.  With the new recursive structure, this only happens when
  doing the fallback for one of the arms.
* Check the actual mask values for something outside of the representable
  range.

Both are covered by recently added tests.

Add TableGen patterns to convert more instructions to boolean
expressions:

- **mul -> and/or**: i1 multiply instructions currently cannot be
selected causing the compiler to crash. See
https://github.com/llvm/llvm-project/issues/57404
- **select -> and/or**: Converting selects to and/or can enable more
optimizations. `InstCombine` cannot do this as aggressively due to
poison semantics.

Add a new node `AArch64ISD::URSHR_I_PRED`.

`srl(add(X, 1 << (ShiftValue - 1)), ShiftValue)` is transformed to
`urshr`, or to `rshrnb` (as before) if the result it truncated.

`uzp1(rshrnb(uunpklo(X),C), rshrnb(uunpkhi(X), C))` is converted to
`urshr(X, C)` (tested by the wide_trunc tests).

Pattern matching code in `canLowerSRLToRoundingShiftForVT` is taken
from prior code in rshrnb. It returns true if the add has NUW or if the
number of bits used in the return value allow us to not care about the
overflow (tested by rshrnb test cases).

There are currently a few checkers that don't fill in the bug report's
"decl-with-issue" field (typically a function in which the bug is
found).

The new attribute `[[clang::suppress]]` uses decl-with-issue to reduce
the size of the suppression source range map so that it didn't need to
do that for the entire translation unit.

I'm already seeing a few problems with this approach so I'll probably
redesign it in some point as it looks like a premature optimization. Not
only checkers shouldn't be required to pass decl-with-issue (consider
clang-tidy checkers that never had such notion), but also it's not
necessarily uniquely determined (consider leak suppressions at
allocation site).

For now I'm adding a simple stop-gap solution that falls back to
building the suppression map for the entire TU whenever decl-with-issue
isn't specified. Which won't happen in the default setup because luckily
all default checkers do provide decl-with-issue.

---------

Co-authored-by: Balazs Benics <benicsbalazs@gmail.com>

This patch adds support for common and local symbols in the TOC for AIX.
Note that we need to update isVirtualSection so as a common symbol in
TOC will have the symbol type XTY_CM and will be initialized when placed
in the TOC so sections with this type are no longer virtual.

---------

Co-authored-by: Zaara Syeda <syzaara@ca.ibm.com>

The inf and nan string index bounds checks were after the index was
being used. This patch moves the index usage to the end of the
condition.

Fixes #79988

Removes the MaterializationResponsibility::addDependencies and
addDependenciesForAll methods, and transfers dependency registration to
the notifyEmitted operation. The new dependency registration allows
dependencies to be specified for arbitrary subsets of the
MaterializationResponsibility's symbols (rather than just single symbols
or all symbols) via an array of SymbolDependenceGroups (pairs of symbol
sets and corresponding dependencies for that set).

This patch aims to both improve emission performance and simplify
dependence tracking. By eliminating some states (e.g. symbols having
registered dependencies but not yet being resolved or emitted) we make
some errors impossible by construction, and reduce the number of error
cases that we need to check. NonOwningSymbolStringPtrs are used for
dependence tracking under the session lock, which should reduce
ref-counting operations, and intra-emit dependencies are resolved
outside the session lock, which should provide better performance when
JITing concurrently (since some dependence tracking can happen in
parallel).

The Orc C API is updated to account for this change, with the
LLVMOrcMaterializationResponsibilityNotifyEmitted API being modified and
the LLVMOrcMaterializationResponsibilityAddDependencies and
LLVMOrcMaterializationResponsibilityAddDependenciesForAll operations
being removed.

This patch adjusts the Docker container intended for CI use to contain a
PGO+ThinLTO+BOLT optimized clang. The toolchain is built within a Github
action and takes ~3.5 hours. No caching is utilized. The current PGO
optimization is fairly minimal, only running clang over hello world.
This can be adjusted as needed.

As mentioned in https://github.com/llvm/llvm-project/pull/74747, this case is triggering a particularly high cost trip count expansion.

Since we already add a `-fmodule-map-file=` argument for every used
modulemap, we can remove all `ModuleMapFiles` entries before adding
them.

This reduces the number of module variants when `-fmodule-map-file=`
appears on the original command line.

This reverts commit 57c66b35.

This reverts commit dad50fef.

This reverts commit cf2533e7.

This reverts commit d6e1ae24.

This reverts commit fa42589f.

This reverts commit c84f2bac.

This reverts commit 51e0d1b7.
That commit breaks a unit test:

```
Failed Tests (1):
  lldb-unit :: Core/./LLDBCoreTests/4/8
```

When a compilation unit has an interface to an external subroutine or
function, and there is a global object (like a module) with the same
name, we're emitting an error. This is too strong, the program will
still build. This comes up in real applications, too. Downgrade the
error to a warning.

Ensure that #include FOO undergoes macro replacement. But, as is the
case with C/C++, continue to not perform macro replacement in a #include
directive with <angled brackets>.

When testing the arguments to see whether they are integers, check first
that they are within the maximum range of a 64-bit integer; otherwise, a
value of larger magnitude will set an invalid operand exception flag.

A DEALLOCATE statement on a pointer should always use
PointerDeallocate() in the runtime, even if there's no STAT= or
polymorphism or derived types, so that it can be checked to ensure that
it is indeed a whole allocation of a pointer.