[InstCombine] Restrain folding switch condition operation into case to one-use
It may be profitable to simplify the switch condition operation into
their cases if such a condition is used only by the switch.
[LifetimeSafety] Add support for tracking non-trivially destructed temporary objects (#172007)
Add support for tracking loans to temporary materializations that
require non-trivial destructors. We only support non-trivially
destructed temporaries as they have a nice end-of-life marker via the
`CFGTemporaryDtor`.
This small PR introduces the following changes:
1. AccessPaths can now also represent `MaterializeTemporaryExpr *` via
`llvm::PointerUnion`
3. `FactsGenerator::VisitMaterializeTemporaryExpr` now checks to see if
the temporary materialization is such that it requires a non-trivial
destructor (by checking for a child `CXXBindTemporaryExpr` node when all
implicit casts are stripped away), and if so: creates a Loan whose
AccessPath is a pointer to that `MaterializeTemporaryExpr`, and issues
it to the origin represented by the `MaterializeTemporaryExpr` node we
were called on. When we cannot find a child `CXXBindTemporaryExpr`, we
fall-back to an `OriginFlow` as before.
4. `FactsGenerator::handleTemporaryDtor` is called from
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[flang-rt] Disable testing support for the GPU cross build (#175583)
Summary:
We're starting to provide the GPU version of the Fortran runtime with
the GPU cross-build semantics. This does not support tests right now but
will attempt to build the unit tests and fail to find gtest for the GPU.
Disable this for now so it can build.
NAS-139292 / 26.04 / Remove caching from sysdataset plugin (#18014)
Retrieving the underlying dataset name for the sysdataset path is now
only two syscalls (statx + statmount) instead of reading the entire
/proc/self/mountinfo contents and so this extra caching actually hurting
us now.
[SampleProf] test that calls to function aliases get profile info (#169355)
When a call is made to a function alias, in
SampleProfileLoader::generateMDProfMetadata we look up the actual call
target name in the profile to resolve the alias, in the same way as we
do for indirect calls. Add a test for this so we don't lose profile info
on these calls some day.
[AArch64] Add new pass after VirtRegRewriter to add implicit-defs
When SubRegister Liveness Tracking (SRLT) is enabled, this pass adds extra
implicit-def's to instructions that define the low N bits of a GPR/FPR
register to represent that the top bits are written, because all AArch64
instructions that write the low bits of a GPR/FPR also implicitly zero the
top bits.
These semantics are originally represented in the MIR using `SUBREG_TO_REG`,
but during register coalescing this information is lost and when rewriting
virtual -> physical registers the implicit-defs are not added to represent
the the top bits are written.
There have been several attempts to fix this in the coalescer (#168353),
but each iteration has exposed new bugs and the patch had to be reverted.
Additionally, the concept of adding 'implicit-def' of a virtual register
during the register allocation process is particularly fragile and many
places don't expect it (for example in `X86::commuteInstructionImpl` the
code only looks at specific operands and does not consider implicit-defs.
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Add umount utility
This commit exposes truenas_os.umount2 as an available utility
in mount.py, and replaces existing subprocess calls to the
umount command with the syscall-based utility.
[flang-rt] Fix unused flag warning when compiling for the GPU (#175643)
Summary:
Because we link the `cxx` target directly we do not need to use this
flag, that's also why we pass `-nostdinc++` which makes this an unused
command line flag, hence the warning.
[AArch64] Let LoadStoreOptimizer handle renamable implicit-defs.
The LoadStoreOptimizer is very conservative with handling instructions
that have implicit-def operands, and only support them for 2 instructions.
However, they can be considered also when marked explicitly as 'renamable'.
[AMDGPU][Scheduler] Fix compile failure due to const/sort interaction (#175755)
On some configurations sorting `ScoredRemat` objects which contains
const members causes a compile failure due to impossibility of
swapping/moving objects. The problem was introduced in #175050.
This removes const from those fields to address the issue. The design
will soon change anyway to not rely on sorting objects of this type, and
consts were only here for semantic clarity.
[MC/DC] Prune MCDCLogOpStack and use CGF.isMCDCDecisionExpr. NFC (#125410)
`MCDCLogOpStack` is used only for detection of the Decision root. It can
be detected with `MCDC::State::DecisionByStmt`.
