[orc-rt] Add Windows page size detection (#224520)
Adds Windows page size detection for ORC-RT using GetSystemInfo.
Also updates the process-info regression coverage into a single test
[LLVM][AutoUpgrade] Support default args on overloaded intrinsics (#217859)
This patch extends intrinsic `DefaultValue` auto-upgrade to overloaded
intrinsics.
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Signed-off-by: DharuniRAcharya <dharunira at nvidia.com>
[AMDGPU] Port Atomic-Optimizer to use Wave Reduction Intrinsics (#211757)
Currently the atomic optimizer creates reductions via intrinsics,
and introduces new control flows.
Replace this sub-target dependent logic with the existing
wave reduction intrinsics, which get lowered in the backend.
This patch ports the uniform-value and divergent-no-return-value cases.
To port the divergent-with-return-value cases, additional scan intrinsics
will need to be added.
[lld] Add -z mark-plt support for X86_64 (#206002)
Add option [no]mark-plt to enable it. Dynamic linker can change PLT
entries with JMPABS instruction on supported targets.
Ref.:
https://maskray.me/blog/2021-09-19-all-about-procedure-linkage-table#x86-plt-rewriting
Assisted-by: Claude Sonnet 4.6
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Co-authored-by: Claude Opus 4.8 <noreply at anthropic.com>
[libc++] Build GoogleBenchmark directly from Lit (#224192)
Previously, we would build GoogleBenchmark against the just-built
library, not against the library being tested. When testing historical
versions of libc++ or other standard libraries, this breaks. So instead
of building Google Benchmark against the just-built library in CMake, do
it from Lit as part of the test suite's configuration.
I'm not a huge fan of using Lit as a poor man's build system and we
should make the CMake test suite self-contained, however this is a step
in the right direction and it removes a major coupling between the test
suite and the regular libc++ build.
[libc++] Pin down the OS version of macOS runners (#225536)
Otherwise, we sometimes end up using runners that don't have Xcode 26.5
on them. Pinning this allows bumping the version explicitly when we are
ready to.
[LV] Narrow truncated inductions in a VPlan transform (#220730)
VPRecipeBuilder::tryToOptimizeInductionTruncate matched a truncate of an
induction phi on the underlying IR, and it built the narrowed
VPWidenIntOrFpInductionRecipe from the recipe behind the truncate's
operand.
VPlanTransforms already answers the same question on VPValues in
getOptimizableIVOf, which returns the header IV whether the operand is
the IV
itself or an add of the IV and its step.
Add VPlanTransforms::narrowInductionTruncates and do the match there,
reusing
getOptimizableIVOf and restricting it to the phi for now. The pass runs
right
after makeCallWideningDecisions, which preserves the ordering against
makeScalarizationDecisions that the recipe builder relied on. Building
the
recipe in the transform also removes the need for the conversion loop to
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[PGO] Add GPU wave counters
Lane counts do not show how often a GPU wave reaches an instrumentation
point. A divergent wave can execute both paths even when few lanes take
one path.
Extend the GPU profiling helper to collect a wave count alongside each
existing lane counter. The first active lane increments the wave counter
once, using the same workgroup sampling decision as the lane counters.
Collect both channels together so shared functions use a consistent
counter layout across translation units. Workgroup sampling controls
profiling overhead.
Carry wave counts through raw and indexed profiles and weighted merging
as a separate channel. Preserve ordinary lane-flow counts and leave
blocks without instrumentation unmeasured.
[libc] Implement dual freestore rotation for baremetal heap (#209811)
Implement dual FreeStore rotation in FreeListHeap under
LIBC_COPT_BAREMETAL_HEAP_ENABLE_FREESTORE_ROTATION option for baremetal
targets.
- Allocations pull from active store; free() quarantines blocks into
non-active store (1 - active).
- On allocation failure in active store, rotate() flips active index and
migrates/coalesces quarantined blocks into the new active store.
- Added 2-bit prev_free tracking in BlockRef metadata to distinguish
freestore indices.
- Added unit smoke tests and updated fuzzer for dual freestore rotation.
Assisted-by: Gemini and Claude based automation tool (human-in-the-loop)
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Co-authored-by: Yifan Zhu <yfzhu at google.com>
Co-authored-by: Claude Fable 5.1 <noreply at anthropic.com>
