[GVN] Preserve provenance when forwarding `<1 x ptr>` (#235505)
GVN forwards a store or load to a load of a different type by going
through an integer. Between `ptr` and `<1 x ptr>`, the sizes match, but
only scalar pointers skipped the integer path. So the value went through
`ptrtoint` and `inttoptr`, which drops pointer provenance, instead of
going through a `bitcast`.
```llvm
store <1 x ptr> %v, ptr %p
%l = load ptr, ptr %p
```
```diff
-%1 = ptrtoint <1 x ptr> %v to <1 x i64>
-%2 = bitcast <1 x i64> %1 to i64
-%l = inttoptr i64 %2 to ptr
+%l = bitcast <1 x ptr> %v to ptr
```
[OpenMP][offload] Size the grid of cross-team reductions by their size (#234190)
Use the ReductionDataSize for sizing the grid of xteam reductions.
Classify a reduction with a ReductionDataSize of 32bytes and more as
"large". Otherwise, we call this reduction "scalar" or "small".
Xteam reductions differ from regular loops in that they have two phases:
the intra-team reduction and the inter-team reduction. The cost of the
latter increases with the number of blocks and the ReductionDataSize.
For small reductions, aim for 16 waves/CU. For large reductions, aim for
1 block/CU.
For Generic and Generic-SPMD loops, we only use this heuristic for large
reductions and use the regular gris size heuristic otherwise since there
is currently no data for these situations.
This is an upstream port of the corresponding downstream. Measurements
have been made on MI210, MI300A, MI300X, MI350X, and MI450.
Claude assisted with this patch.
be more careful when killing a ProxyCommand (including implicit ProxyJump
ones); observe if it already has exited via the main ssh.c SIGCHLD handler
and wrap the kill in sigprocmask() to avoid races.
Prevents SIGHUP from being delivered to an unrelated process if the proxy
command's PID is recycled.
Antropic ANT-2026-ODQD8QBH
Correctly error on a algorithm allowlist that removes all algorithms, e.g.
`PubkeyAcceptedAlgorithms -*` rather than defaulting back to the full list
Anthropic ANT-2026-O2RQ9GNA
set a glob(3) error callback when globbing Include files to allow
discrimination between missing files/directories and failure to open
a file or directory.
Avoids possible (though unlikely) situation where a local attacker could
cause an Include'd file from being processed by doing tricks like hitting
fd limits at the right time.
Anthropic ANT-2026-NF7CR4JX
[libc] Reset fatal signal handlers in death test subprocesses (#236679)
Death tests (EXPECT_DEATH/ASSERT_DEATH) run the callback in a forked
child and check that the child was killed by a signal. If the test runs
under a runtime that installs its own handlers for fatal signals, the
child may not die from the signal at all. For example, on x86-64, ASan
with `handle_sigill=1` catches the SIGILL raised by `__builtin_trap()`,
prints an error report and calls `_exit()` (with the default
`abort_on_error=0` on Linux), so the test fails with:
Expected [] { optional<int> opt_empty; (void)opt_empty.value(); } to be
killed by a signal
But it exited normally!
This is what happens to the death tests in optional_test and
expected_test, as well as the null-check death tests, when run with
`ASAN_OPTIONS=handle_sigill=1`. ASan handles SIGSEGV, SIGBUS and SIGFPE
by default, so tests expecting those fail even with default options.
That's why pkey_test and the libgen death tests are not built under
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be more liberal in accepting tab-separated @revoked markers in known_hosts
These shouldn't be ignored if the user picked the wrong whitespace...
Anthropic ANT-2026-LIFVTX5L
make `ssh-keygen -H` (hash a known_hosts file) also strip comments from
the output. The intention is to obscure the hostnames and so including
comments, especially ones that come from ssh-keyscan, totally defeats
the purpose
Anthropic ANT-2026-KI130WJG
fix `CheckHostIP yes` bypass in cases where a server sends a certificate
hostkey. This will ignore any key recorded for the IP address (as is
supposed to happen when CheckHostIP is enabled and fall back to the
new-hostkey path if the hostname had not already matched
Anthropic ANT-2026-KDXJ0Q4K
[mlir][SPIR-V] Dispatch autogen serialization through a TypeID table (#236992)
Ops were matched by a linear isa chain over 408 op types
TypeID map lookup gives identical output and lower wall time on
synthetic modules
`mlir-translate --serialize-spirv` results on artificial input:
| Funcs | Runs | Before | After | Change |
|------:|-----:|----------:|----------:|-------:|
| 1 | 300 | 3.07 ms | 3.00 ms | -2.3% |
| 10 | 300 | 6.45 ms | 5.93 ms | -7.9% |
| 100 | 100 | 39.68 ms | 34.59 ms | -12.8% |
| 1000 | 40 | 236.52 ms | 215.34 ms | -9.0% |
| 1500 | 30 | 668.85 ms | 595.77 ms | -10.9% |
