[NFC][AMDGPU] Add tests for an fmul split from its fadd/fsub user (#213303)
Record the current behaviour over the types and subtargets where the
fusion rules differ, f32, f16, bf16, f64, v2f32 and v2f16, with
denormals both enabled and flushed, with and without the contract flags,
and under -fp-contract=fast.
Contributes to https://github.com/llvm/llvm-project/issues/211092
cp: Correct description of SIGINFO
The manual page claimed that SIGINFO caused information to be printed to
stdout, when in fact it is printed to stderr, as one would expect. This
has been true ever since the feature was first added in 2003.
MFC after: 1 week
Fixes: 00d321a2b395 ("Add a SIGINFO handler.")
Reviewed by: jilles
Differential Revision: https://reviews.freebsd.org/D58392
(cherry picked from commit 5dc400ff452b0259f0c50474255ebe6e5e02edb9)
cp: Correct description of SIGINFO
The manual page claimed that SIGINFO caused information to be printed to
stdout, when in fact it is printed to stderr, as one would expect. This
has been true ever since the feature was first added in 2003.
MFC after: 1 week
Fixes: 00d321a2b395 ("Add a SIGINFO handler.")
Reviewed by: jilles
Differential Revision: https://reviews.freebsd.org/D58392
(cherry picked from commit 5dc400ff452b0259f0c50474255ebe6e5e02edb9)
libfetch: Fix handling of connection failures
After commit 848f360c8f9a, if one tries to connect to a closed port,
fetch reports "Operation now in progress", which is rather confusing.
Return a more useful error message, restoring the old behaviour.
Fixes: 848f360c8f9a ("libfetch: Apply timeout to connection attempts")
Reviewed by: des
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D58481
(cherry picked from commit b02e02958dad2d5ce3675cbc18b9a94635d09e66)
libfetch: Further improve connection polling
* Reorganize the connection loop to make it a little more readable
* Start the timeout clock earlier
* Correctly calculate the poll timeout before calling poll()
* Don't leak the socket on failure
Fixes: 848f360c8f9a ("libfetch: Apply timeout to connection attempts")
Fixes: b02e02958dad ("libfetch: Fix handling of connection failures")
MFC after: 3 days
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D58512
(cherry picked from commit 351ed134887fe5b8da39d22fcb267c96ab009ca2)
libfetch: Fix handling of connection failures
After commit 848f360c8f9a, if one tries to connect to a closed port,
fetch reports "Operation now in progress", which is rather confusing.
Return a more useful error message, restoring the old behaviour.
Fixes: 848f360c8f9a ("libfetch: Apply timeout to connection attempts")
Reviewed by: des
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D58481
(cherry picked from commit b02e02958dad2d5ce3675cbc18b9a94635d09e66)
libfetch: Further improve connection polling
* Reorganize the connection loop to make it a little more readable
* Start the timeout clock earlier
* Correctly calculate the poll timeout before calling poll()
* Don't leak the socket on failure
Fixes: 848f360c8f9a ("libfetch: Apply timeout to connection attempts")
Fixes: b02e02958dad ("libfetch: Fix handling of connection failures")
MFC after: 3 days
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D58512
(cherry picked from commit 351ed134887fe5b8da39d22fcb267c96ab009ca2)
[ConstraintElim] Decompose xor %a, -1 as -1 - %a in the signed system. (#213476)
InstCombine canonicalizes sub nsw i8 -1, %a -> xor i8 %a, -1. Decompose
the XOR as `sub nsw -1, %a` in the signed system
Alive2 Proof: https://alive2.llvm.org/ce/z/f_YVjH
This triggers quite rarely in C/C++ workloads (no end-to-end changes in
https://github.com/dtcxzyw/llvm-opt-benchmark-nightly/pull/840), found
one instance in Blender. One simple end-to-end C example is
https://clang.godbolt.org/z/G343shYje
This is part of an effort to improve ConstraintElimination support for
IR generated by the Swift compiler, where such patterns are more common
due to a number of signed runtime checks.
PR: https://github.com/llvm/llvm-project/pull/213476
[ELF] Emit synthetic local in symbol table for non-preemptible IFUNC
Currently we create an internal alias of the original symbol and then
rewrite the latter to point to the IPLT entry, which means we lose
symbol table information for the actual resolver. In practice compilers
also emit a normal function symbol for the resolver due to how IFUNCs
are represented in GNU C so that at least shows up, but we shouldn't be
relying on it. By emitting a synthetic local we can keep having a symbol
for the resolver whilst still redirecting references to the IPLT entry.
[NFC][ELF] Remove Symbol's unused copy constructor
Now that we are no longer copying symbols via the copy constructor we
can remove it. Given we track symbol pointers in various data structures
it can be dangerous to have multiple objects for the same symbol that
would risk being viewed inconsistently, or even moved and the original
lost, though no such cases exist upstream that I'm aware of.
Copying a symbol entirely is also a weird thing to do, and can be
inefficient, so when copies are being made it's best to be explicit
about the members to copy. This also makes it clearer to understand what
members are relevant, rather than implicitly copying all the members,
most of which aren't relevant in practice.
Whilst the copy/move constructors/assignment operators are currently
implicitly deleted due to the atomic flags member, explicitly delete
them all so they remain deleted in case that ever changes.
[NFC][ELF] Create fresh alias in handleNonPreemptibleIfunc
We don't need to copy the full symbol here, we just want an internal
alias to use for the IPLT and IGOTPLT entries and IRELATIVE relocation's
addend.
[NFC][ELF] Only create alias in handleNonPreemptibleIfunc if needed
In the no direct relocations case, the original IFUNC symbol keeps its
value, and so there's no need to create a separate alias; it's only
needed when the original symbol is being redirected to the IPLT as a
normal function symbol.
This change also shifts the isInIplt assignment to be explicit and
mirror the allocateAux/pltIdx uses, rather than relying on makeDefined
copying it, and to be clear that this is in fact deliberately and
consistently being copied like them.
[NFC][ELF] Avoid need to copy Symbol in replaceWithDefined (#210612)
Firstly, by overwriting the symbol, it will have its existing flags, so
there is no need to copy them back; all we need to do is mask out the
other bits on the existing symbol.
Secondly, copying the whole symbol just to preserve the symbol version
that gets cleared by Defined::overwrite is a waste; just copy the single
member to reinstate it.
clang/AMDGPU: Fix confused image builtin availability tests
These tests appear to have been copy paste from other image error
tests, which were checking for invalid argument validation. The point
of these tests were to reject image builtins on unsupported targets,
and not just gfx942. Rename the tests, and fix the invalid argument usage.
Each builtin should be used in a valid way.
Co-authored-by: Claude (Claude-Opus-4.8)
Merge tag 'riscv-for-linus-7.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Paul Walmsley:
- Fix swiotlb initialization on systems where DRAM is located above
4GiB (such as the Tenstorrent Blackhole cards)
- Fix an out-of-bounds access in the memory hot-remove code that can
occur on Sv39 and Sv48 systems
- Avoid oopsing during boot if the SBI component of the unaligned
access performance checking code loses a race against __init function
freeing
- Avoid attempting to install the debug-enabled vDSO when it shouldn't
be built due to !CONFIG_MMU
- Avoid some sparse warnings by adding missing __iomem notations in
get_cycles{,_hi}()
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Merge tag 's390-7.2-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Vasily Gorbik:
- Fix PCI MMIO write syscall falsely reporting success for mappings not
valid for MMIO when MIO is unavailable by returning -EFAULT
- Fix CPRB parameter buffer overflows in zcrypt CCA AES cipher and ECC
private key conversion by rejecting oversized key tokens
- Fix buffer overreads and length underflow in pkey and zcrypt CCA
token validation by checking length fields against actual buffer
sizes
- Fix out of bounds permission bitmap access in zcrypt EP11 admin CPRB
filtering on custom device nodes by using AP_DOMAINS as the limit
- Fix speculative permission bitmap reads in zcrypt CCA and EP11 admin
CPRB handling by sanitizing user controlled domain indexes
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