[libc] Handle PTHREAD_NULL in pthread_equal (#227856)
POSIX.1-2024 specifies that pthread_equal must accept PTHREAD_NULL for
either or both arguments. Previously, Thread::operator== dereferenced
attrib->tid, which crashed when passed a null or zero-initialized
pthread_t.
Compare Thread::attrib pointers directly in an inline constexpr
operator== in thread.h, matching how Thread::join and
pthread_getunique_np identify threads. Added PTHREAD_NULL test cases to
pthread_equal_test and updated file headers in the touched files.
Assisted-by: Automated tooling, human reviewed.
[LiveDebugVariables] Repair stale SlotIndexes
The analysis keeps its indexes from before the first register allocator
until DBG_VALUEs are emitted, by which point passes in between have
erased some of the instructions they point at. Resolve them at the
start of each allocator run and before emitting.
SlotIndexes can then reclaim the entries of erased instructions without
sparing the ones held here, which would have made generated code depend
on -g. Emitted locations are unchanged, except that intervals resolving
to one position now emit a single DBG_VALUE rather than identical
consecutive ones.
[SlotIndexes] Add queries for stale indexes
An erased instruction leaves its index list entry in place, making the
index indistinguishable from a block boundary entry. Add
isBlockBoundaryIndex() and isStaleIndex() to tell the two apart, and
canonicalizeIndex() to resolve a stale index to the closest preceding
instruction's register slot, or the block start if none survives.
NFC. No caller yet. LiveDebugVariables is next.
x11-fonts/py-cu2qu: Remove expired port
2026-05-31 x11-fonts/py-cu2qu: This library is now maintained as part of fonttools. Use print/py-fonttools instead
[flang][cuda] Count managed symbols per component chain in assignment check (#227825)
The check for a device to host transfer with more than one device object
on the right hand side compares the number of unique device symbols with
the number of managed or unified symbols, to allow the case where every
object is managed. The two counts were computed differently: device
symbols are counted once per component chain, while managed symbols were
counted individually. When both a derived type object and its component
are managed, the component chain contributed one device symbol but two
managed symbols, so the counts never matched and a valid assignment was
rejected:
```
type(t), managed, allocatable :: s(:) ! t has a managed component a
real, managed, allocatable :: b(:,:), c(:,:)
x = (b(i,j) - s(1)%a(i,j)) * c(i,j)
! error: More than one reference to a CUDA object on the right hand
! side of the assignment
```
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[lldb] Fix adding shared ScriptInterpreter libraries to LLDB.framework (#223782)
These libraries were already being added to the framework in the build
tree but installation rules were still putting it in `/lib`. I pulled
the Python and Lua logic into a separate function and changed the
install logic when LLDB_BUILD_FRAMEWORK is enabled.
MIR: Serialize MachineBasicBlock::MaxBytesForAlignment (#227139)
Fix missing serialization of another field. The alignment was
already handled. The name is a bit verbose. Some places call it
"MaxSkip" which matches the name of the 2nd operand to the .p2align
directive this corresponds to.
Co-authored-by: Claude Sonnet 5 <noreply at anthropic.com>
