[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.
[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.
[Github] Add LLVM-libc's full-build to Bazel Checks workflow
This PR adds a job to run `bazelisk test --@llvm-project//libc:build_mode=full @llvm-project//libc/...`. It is part of an effort to support LLVM-libc's full build functionality in Bazel.
[bazel][libc] Refactor to allow copts under full-build mode
This PR moves away from having sets of predefined groups of copts and allows just directly using them. This lets the Bazel rules more directly parallel CMake.
[ORC] Call Perf/VTune support wrappers through Proxies (#226677)
Hold PerfSupportPlugin's start/end registration wrappers and
VTuneSupportPlugin's unregister wrapper as Proxy members, replacing
their callSPSWrapper calls. Each proxy is built in the constructor from
the address it already takes, so the constructor signatures are
unchanged. The Perf impl and VTune register wrappers are only used as
alloc-action tags and stay ExecutorAddrs.
