[RISCV][NFCI] Introduce Base for Pseudo Expansion Passes (#218170)
This introduces a base class for the Pseudo Instruction Expansion Pass
Implementations, which shares the boiler plate that ensures the function
size estimate does not grow during expansion.
This also makes many of those methods `const`, to more clearly
illustrate how the Impl class works - that per-instruction info is
mostly passed as parameters and not stored in the class members.
This is used to simplify all four of the Pseudo Instruction Expansion
passes. Additionally, many static functions in the Atomic Expand pass
are moved onto the Impl class, so they can directly access the subtarget
and instruction info.
Assisted-by: AI
[clang-repl] Don't double-remove extern "C" decls from the IdResolver (#218129)
Regression was introduced in https://github.com/llvm/llvm-project/pull/178648
This is required for the 23 release; the downstream tools CppInterOp & Cppyy will fail otherwise.
[clang][Driver] Fix libc++ include path on FreeBSD (#212725)
`clang++` defaults to `-stdlib=libc++` on FreeBSD. When building with
both `clang` and `libcxx` included, the freshly built `clang++` uses the
system version of the `libc++` headers. However, this is from the
bundled `libc++` 19.1.7, thus inconsistent with the `libc++` being
built.
Similarly to the NetBSD case, FreeBSD has its own version of
`addLibCxxIncludePaths` which just includes `/usr/include/c++/v1`.
This patch removes `FreeBSD::addLibCxxIncludePaths` in favour of the
generic version in `Gnu.cpp`.
Tested on `amd64-pc-freebsd15.1`.
[Verifier] Prevent insertion/extraction of scalable vectors into/from fixed vectors (#215647)
Per LangRef:
> Scalable vectors can only be inserted into other scalable vectors.
> (...)
> Scalable vectors can only be extracted from other scalable vectors.
Add checks to enforce these rules for `llvm.vector.insert` and
`llvm.vector.extract` intrinsics.
[DomTree] Prepend children instead of appending (#218178)
Follow-up to #176409: `AppendPtr` exists only to keep a node's children
in the order they are added, and a lot of code depends on the order.
Implement an altrenative: in `attachNewSubtree`, create nodes in DFS
order and then link them in reverse. Trees built from scratch are
unchanged. Two tests that print an updated tree are adjusted.
[flang][test] Link designator-path test with FortranParser (#218204)
This is the missing build dependency that wasn't added to
https://github.com/llvm/llvm-project/pull/211606.
It should resolve a some of the build bot failures that have been
reported there.
[clang][bytecode] Use a SmallPtrSet in collectBlocks() (#218192)
Not sure why I used a SetVector here, but switch it to a SmallPtrSet
(this also gets rid of an additional include when #186045 gets merged).
[MLIR][Python] Don't throw in PyDenseArrayIterator dunderNext (#218193)
`PyDenseArrayIterator::dunderNext` signaled iterator exhaustion by
throwing `nanobind::stop_iteration()`. Raising a C++ exception to signal
`StopIteration` incurs stack-unwinding cost on every loop over a dense
array attribute.
#175377 replaced this pattern with `PyErr_SetNone(PyExc_StopIteration)`
(return a null object after setting the Python error indicator) for the
other iterators in the bindings. `PyDenseArrayIterator` was missed in
that change and still throws. This PR applies the same conversion to
`PyDenseArrayIterator::dunderNext`.
Assisted by: Claude
[FoldingSet] Invalidate iterators on mutation (#218179)
Tighten FoldingSet's iterator contract so that, like DenseMap (#199369)
and StringMap (#202237), mutating the set invalidates iterators obtained
before the call. insert / remove (successful) / clear / move bump the
epoch, so a stale iterator fails under LLVM_ENABLE_ABI_BREAKING_CHECKS.
LLM-aided
Reapply "[llc] Register pass plugin callbacks with the new pass manager" (#217727) (#218163)
Reapplies #217727 (aa8d1afeed37), reverted in #218119 (91b04b4d45d9).
The test hardcoded Clang's spelling of an anonymous namespace in
--print-pipeline-passes output. The pass name comes from getTypeName(),
which scrapes __PRETTY_FUNCTION__; that spells anonymous namespaces as
"(anonymous namespace)" under Clang but "{anonymous}" under GCC. Relax
the FileCheck pattern so it is compiler-agnostic.
[clang][ssaf] Add cpp-bounded-buffers source transformation (#210457)
Adds the first built-in transformation, `cpp-bounded-buffers`, which
rewrites buffers -- raw pointers and arrays -- into bounded types
(`bounded_ptr<T>`, `bounded_array<T, N>`) using the reachability
computed by `UnsafeBufferReachableAnalysis`.
The transformation collects every reachable pointer/array declarator and
function return declared in the translation unit, then either rewrites
it or records a SARIF note explaining why it did not. Shapes that are
not yet handled -- multi-level pointers, pointer to array, references to
pointers, multi-dimensional and unbounded arrays, multi-declarator
groups, macro-spelled declarators, and trailing return types -- are
reported rather than rewritten, and a final pass reports any reachable
entity that was neither rewritten nor otherwise accounted for. Edits are
validated and committed atomically, so a declarator whose edit cannot be
formed (such as a raw array of function pointers) is reported instead of
mangled.
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workflows/release-binaries: Install Wix on Windows ARM64 (#217707)
Wix is used for generating the installer and is not installed by default
on Windows ARM64.
[MLIR][Python] Don't throw in PyDenseArrayIterator dunderNext
Signal iterator exhaustion via PyErr_SetNone(PyExc_StopIteration) instead
of throwing nanobind::stop_iteration(), matching the pattern used by the
other iterators in the Python bindings (see #175377). Raising a C++
exception to signal StopIteration incurs stack-unwinding cost on every
loop, which PyDenseArrayIterator was still paying. The return type changes
to nanobind::typed<nanobind::object, EltTy> so the method can return a null
object after setting the Python error indicator.
[RISCV] Merge RISCVISD::PMUL_H_B01 and RISCVISD::PMUL_W_H01. (#218046)
Same for RISCVISD::PMULU_H_B01/PMULU_W_H01 and
RISCVISD::PMULSU_H_B00/PMULSU_W_H00.
We can distquish by types, we don't need different nodes for each type.
[SSAF][PointerFlow] Change unsafe-buffer reachability analysis back to simple graph search
Because of commit 30cd4297b, we no longer need unsafe-buffer
reachability analysis to "uncompress" pointer flow graphs. It can go
back to simple DFS. Since it deals with large data, simplicity is
important.
In addition, unit tests for the "compressed" pointer flow graphs are
moved to lit tests because they are no longer suitable as WPA unit
tests. As lit tests, they are end-to-end tests where the extractor is
involved and is responsible for generating "uncompressed" graphs.
Final step of
rdar://183529483
[RISCV] Avoid fatal error for SiFive CLIC preemptible frame pointers (#217949)
SiFive CLIC `preemptible` interrupt handlers currently use `s0` to
preserve `mcause` and cannot be generated with a frame pointer. At
`-O0`, Clang enables frame pointers by default, causing the fatal error
to produce a backend crash report.
This commit switches to `DiagnosticInfoUnsupported` to emit a regular
source-located error and suggest considering `-fomit-frame-pointer`.
This does not change the existing code generation restriction.
Fixes https://github.com/llvm/llvm-project/issues/217936
[NewPM] Port LiveRangeShrink to the new pass manager
Follow the same pattern used for EHContGuardTargets and
CFGuardLongjmp: extract the pass body into a free function, rename
the legacy pass to LiveRangeShrinkLegacy, and add a
LiveRangeShrinkPass for the new pass manager. Register it in
MachinePassRegistry.def, replacing the DUMMY_MACHINE_FUNCTION_PASS
stub, and add the missing include to X86CodeGenPassBuilder.cpp,
which already called addMachineFunctionPass(LiveRangeShrinkPass(),
PMW) in its addPreRegAlloc.
Unlike EHContGuardTargets/CFGuardLongjmp, this pass is skippable
(runOnMachineFunction calls skipFunction), so the new-PM pass uses
OptionalPassInfoMixin rather than RequiredPassInfoMixin, matching
BreakFalseDepsPass.
Update llc-pipeline-npm.ll: the pass now prints its registered
"lrshrink" name instead of falling back to the raw C++ type name.
Add -enable-new-pm RUN lines to the three existing lrshrink tests;
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[Clang] Remove dead code related to atomics (NFC) (#216614)
This PR cleans up dead code in `CGObjC.cpp` related to unaligned
atomics.
Because the synchronization strategy (native vs. objc_copyStruct) is
baked into the ABI for compiled frameworks, it can essentially never be
changed for existing architectures like x86 without breaking backwards
compatibility.
