[InstCombine] Fold uitofp of masked truncations (#222592)
Fold an unsigned integer-to-floating-point conversion of a masked
truncation by widening the mask and eliminating the truncation:
`uitofp((trunc X) & C)` → `uitofp(X & zext(C))`
Apply the fold when the intermediate instructions have one use and
widening the integer operation is desirable.
This reduces the instruction count on both AMDGPU and NVPTX.
AMDGPU example: https://godbolt.org/z/rTYhM61ce
NVPTX example: https://godbolt.org/z/fWhsrne19
Merge tag 'x86_urgent_for_7.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Dave Hansen:
"The most notable fix is THP not silently losing user data and having
been around for a couple of years. The main explanation I'd have for
its longevity is that it requires a few different things to align at
the same time: MADV_FREE, THP and heavy reclaim.
- Fix user-space data loss with THP
- Fix set_memory oopses
- Fix addition of large constants in mul_u64_add_u64_div_u64()
- Fix FineIBT hash offset in cfi_get_func_hash()
- Fix PCI device reference counting in amd_smn_init()"
* tag 'x86_urgent_for_7.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
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nfscl: Yet more fixes for the NFS over RDMA client glue
Yet again. I was trying to make the svc_vc_backchannel()
operations do double duty and be used by the clnt_rdma.c code
as well. It got too messy, so this reverts svc_vc.c back to
its pre-glue form and adds the small changes needed to support
a separate set of svc_rdma_backchannel_xxx() functions.
This commit should not affect non-RDMA behaviour.
MFC after: 3 months
Fixes: 884ee8d6c9b4 ("nfscl: Add some glue for client side NFS over RDMA")
[clang][Lex] Unique ModuleMacros with a UniquingSet (NFC) (#223270)
This patch migrates ModuleMacros in Preprocessor from llvm::FoldingSet
to llvm::UniquingSet.
ModuleMacro keys on a pair of Module * and const IdentifierInfo *.
Switching to UniquingSet allows us to look up macros with a typed key,
eliminating FoldingSetNodeID serialization at lookup sites and removing
ModuleMacro::Profile.
Assisted-by: Antigravity
[RISCV][MC] Add experimental Smidctrl, Ssidctrl, Smnip, and Ssnip support (#218108)
Add experimental MC support for Smidctrl, Ssidctrl, Smnip, and Ssnip
extensions.
This completes MC support for the ACLIC v0.20 extensions.
security/vuxml: Document gitea < 1.27.3 vulnerabilities
Gitea 1.27.3 fixes 26 security issues, hardens issue searching
that an unfiltered query no longer enumerates every public
repository into the indexer filter and removes unsafe code
from the internal private endpoints.
PR: 298072
Approved by: osa, vvd (Mentors, implicit)
security/vuxml: Document gitea < 1.27.3 vulnerabilities
Gitea 1.27.3 fixes 26 security issues, hardens issue searching
that an unfiltered query no longer enumerates every public
repository into the indexer filter and removes unsafe code
from the internal private endpoints.
PR: 298072
Approved by: osa, vvd (Mentors, implicit)
[lldb] Test undefined return addresses in signal frames (#223046)
Signal-frame CFI can explicitly mark its return-address register
undefined to represent a terminal synthetic context. This is useful for
contexts such as newly created FreeBSD kernel threads that do not have
an interrupted caller.
Verify that LLDB keeps the signal frame in the backtrace and terminates
the unwind without creating a caller.
Assisted-by: GPT
