[CIR] Implement initial flattening of cleanup scope ops (#180063)
This implements flattening of `cir.cleanup.scope` operations that have a
single exit, and introduces checks to detect multiple exit cases and
report an error when they are encountered. At this point, only normal
cleanups are flattened. EH cleanup handling will be added in a future
change.
Substantial amounts of this PR were created using agentic AI tools, but
I have carefully reviewed the code, comments, and tests and made changes
as needed.
[libcxx] Rename `__split_buffer` alias template to `_SplitBuffer` (#180284)
`-Wchanges-meaning` is a GCC warning that catches shadowing in more
contexts. While a bit annoying here, it's a helpful warning. As such, we
need to rename the `__split_buffer` alias template in `std::vector` so
that we don't trip it up.
expose getObjCDirectMethodCallee for swift
Swift may need to emit calls to thunks as well. Instead
of letting swift rewrite the thunk generation logic, we
might as well expose the method.
[MLIR][XeGPU] Fixing PR179016 minor issues (#180295)
Fix two issues brough by PR179016:
1. unused variable if build the option with
"DLLVM_ENABLE_ASSERTIONS=OFF"
2. Recover modification to recoverTemporaryLayouts() brought by
PR176737. Unintentionally lost during the merging process.
[clang] Canonicalizing `-include-pch` input in the Frontend (#180065)
This patch adds logic to canonicalize `-include-pch`'s input in the
frontend. This way, the `ASTWriter` always serializes the canonicalized
path to the included pch file whether the input is an absolute path or a
relative path.
Fixes rdar://168596546.
[LifetimeSafety] Treat std::unique_ptr::release() as a move operation (#180230)
Add support for `std::unique_ptr::release()` in lifetime analysis to
avoid false positives when ownership is manually transferred via
`release()`.
- Added a new function `isUniquePtrRelease()` to detect when
`std::unique_ptr::release()` is called
- Modified `handleInvalidatingCall()` to mark the unique_ptr as moved
when release() is called
When manually transferring ownership using `std::unique_ptr::release()`,
the lifetime analysis would previously generate false positive
use-after-free warnings. This change treats `release()` as a move
operation, correctly modeling the ownership transfer semantics and
reducing false positives in code that manually manages ownership.
[Clang] Mark this pointer in destructors dead_on_return (#166276)
This helps to clean up any dead stores that come up at the end of the
destructor. The motivating example was a refactoring in libc++'s
basic_string implementation in 8dae17be2991cd7f0d7fd9aa5aecd064520a14f6
that added a zeroing store into the destructor, causing a large
performance regression on an internal workload. We also saw a ~0.2%
performance increase on an internal server workload when enabling this.
I also tested this against all of the non-flaky tests in our large C++
codebase and found a minimal number of issues that all happened to be in
user code.
[MLIR][Python] Remove partial LLVM APIs in python bindings (4/n) (#180256)
This PR continues work from #178290
It replaces some LLVM utilities with straightforward `std::`
equivalents.
[SPIRV] Fix APInt overflow in memset constant array creation (#180189)
In getOrCreateConstIntArray(), the cache UniqueKey encoded the array
size (Num) using the array element type (e.g. i8 for memset). Since Num
is a size_t that can exceed 255, this caused an APInt overflow when Num
> 255. Use i64 for Num in the UniqueKey.
[SPIRV] Fix alignment overflow in memory intrinsics (#180184)
Per SPIR-V spec alignment is 32-bit integer, so it should be encoded as
i8 in the intrinsics'
def.
[clang][analysis][dataflow] Detect goto backedges to trigger Widen (#179546)
Currently, the Clang Dataflow Framework only does Widen on backedges
from structured loops.
Missing some Widen calls (e.g., when there are backedges from gotos)
could cause some analyses to iterate ~forever (until the max visits
limit is hit).
This adds a simple search for backedges, and triggers Widen on the
additional backedge nodes. Fixes [issue 179083.
](https://github.com/llvm/llvm-project/issues/179083)
[llvm/CAS] Add file-based APIs to `OnDiskGraphDB` (#179782)
These allow performing optimizations that reduce I/O and disk space
consumption. For example, when applicable, a file can be cloned directly
into the database directory, instead of needing to load it in memory and
then copy its contents into a new file.
These APIs are then used to optimize importing data from an upstream DB
by using file cloning where applicable.
[HLSL] Represent Matrix as arrays of vectors in memory (#179861)
fixes https://github.com/llvm/llvm-project/issues/179859
For matrix types we need to check the language mode so we can change the
matrix memory layout to arrays of vectors. To make this play nice with
how the rest of clang treats matrices we need to modify the
MaybeConvertMatrixAddress and the CreateMemTemp function to know how to
reconstruct a flattened vector.
Rest of changes is just test updates.
[Hexagon] Add post-RA live variables analysis (#179531)
This patch adds HexagonLiveVariables, a post-RA liveness analysis for
physical registers, to keep block live-ins/live-outs and operand
kill/dead markers consistent after late Hexagon transforms; it is run
after GenMux in the pre-emit pipeline.
Author: Sergei Larin <slarin at qti.qualcomm.com>
Patch By: Fateme Hosseini <fhossein at qti.qualcomm.com>
Co-authored-by: Sergei Larin <slarin at qti.qualcomm.com>
