[libc++] Support build failures when running LNT benchmarks (#185234)
It's rare but possible for the codebase not to build. When that happens,
we should carry on and still submit an empty LNT report for that order,
otherwise we'll get stuck thinking that order hasn't been benchmarked
yet.
[CIR] Change CmpOp assembly format to use bare keyword style
Update the assembly format of cir.cmp from the parenthesized style
cir.cmp(gt, %a, %b) : !s32i, !cir.bool
to the bare keyword style used by other CIR ops like cir.cast:
cir.cmp gt %a, %b : !s32i
The result type (!cir.bool) is now automatically inferred as it is
always cir::BoolType.
libc/riscv64: temporarily disable strnlen() implementation until a fix is developed
strnlen() doesn't seem to cope well with a length argument such that
string pointer plus length overflows past the end of the address space.
Reviewed by: fuz
MFC after: 1 week
PR: 293353, 293296
Differential Revision: https://reviews.freebsd.org/D55714
[CIR] Split CIR_UnaryOp into individual operations
Split the monolithic cir.unary operation (which dispatched on a
UnaryOpKind enum) into four separate operations: cir.inc, cir.dec,
cir.minus, and cir.not.
This follows the same pattern used when cir.binop was split into
individual binary operations (AddOp, SubOp, etc.).
Changes:
- Add CIR_UnaryOpInterface with getInput()/getResult() methods
- Add CIR_UnaryOp and CIR_UnaryOpWithOverflowFlag base classes
- Define IncOp, DecOp, MinusOp, NotOp with per-op folds
- Add Involution trait to NotOp for not(not(x)) -> x folding
- Replace createUnaryOp() with createInc/Dec/Minus/Not builders
- Split LLVM lowering into four separate patterns
- Split LoweringPrepare complex-type handling per unary op
- Update CIRCanonicalize and CIRSimplify for new op types
- Update all codegen files to use bool params instead of UnaryOpKind
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[LLVM][WebAssembly] Regenerate ct.select test CHECK lines
Update CHECK lines to match the new constant-time AND/OR/XOR expansion
from the CT_SELECT legalization fix.
[LLVM][X86] Add f80 support for ct.select
Add special handling for x86_fp80 types in CTSELECT lowering by splitting
them into three 32-bit chunks, performing constant-time selection on each
chunk, and reassembling the result. This fixes crashes when compiling
tests with f80 types.
Also updated ctselect.ll to match current generic fallback implementation.
[LLVM][X86] Add native ct.select support for X86 and i386
Add native X86 implementation with CMOV instructions and comprehensive tests:
- X86 ISelLowering with CMOV for x86_64 and i386
- Fallback bitwise operations for i386 targets without CMOV
- Post-RA expansion for pseudo-instructions
- Comprehensive test coverage:
- Edge cases (zero conditions, large integers)
- i386-specific tests (FP, MMX, non-CMOV fallback)
- Vector operations
- Optimization patterns
The basic test demonstrating fallback is in the core infrastructure PR.
[LLVM][ARM] Add native ct.select support for ARM32 and Thumb
This patch implements architecture-specific lowering for ct.select on ARM
(both ARM32 and Thumb modes) using conditional move instructions and
bitwise operations for constant-time selection.
Implementation details:
- Uses pseudo-instructions that are expanded Post-RA to bitwise operations
- Post-RA expansion in ARMBaseInstrInfo for BUNDLE pseudo-instructions
- Handles scalar integer types, floating-point, and half-precision types
- Handles vector types with NEON when available
- Support for both ARM and Thumb instruction sets (Thumb1 and Thumb2)
- Special handling for Thumb1 which lacks conditional execution
- Comprehensive test coverage including half-precision and vectors
The implementation includes:
- ISelLowering: Custom lowering to CTSELECT pseudo-instructions
- ISelDAGToDAG: Selection of appropriate pseudo-instructions
- BaseInstrInfo: Post-RA expansion of BUNDLE to bitwise instruction sequences
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[LLVM][AArch64] Add native ct.select support for ARM64
This patch implements architecture-specific lowering for ct.select on AArch64
using CSEL (conditional select) instructions for constant-time selection.
Implementation details:
- Uses CSEL family of instructions for scalar integer types
- Uses FCSEL for floating-point types (F16, BF16, F32, F64)
- Post-RA MC lowering to convert pseudo-instructions to real CSEL/FCSEL
- Handles vector types appropriately
- Comprehensive test coverage for AArch64
The implementation includes:
- ISelLowering: Custom lowering to CTSELECT pseudo-instructions
- InstrInfo: Pseudo-instruction definitions and patterns
- MCInstLower: Post-RA lowering of pseudo-instructions to actual CSEL/FCSEL
- Proper handling of condition codes for constant-time guarantees
[LLVM][RISCV] Regenerate ct.select test CHECK lines
Update CHECK lines to match the new constant-time AND/OR/XOR expansion
from the CT_SELECT legalization fix.
[ConstantTime][RISCV] Add comprehensive tests for ct.select
Add comprehensive test suite for RISC-V fallback implementation:
- Edge cases (zero conditions, large integers, sign extension)
- Pattern matching (nested selects, chains)
- Vector support with RVV extensions
- Side effects and memory operations
The basic fallback test is in the core infrastructure PR.
[LLVM][MIPS] Regenerate ct.select test CHECK lines
Update CHECK lines to match the new constant-time AND/OR/XOR expansion
from the CT_SELECT legalization fix.
Merge tag 'fbdev-for-7.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev
Pull fbdev fix from Helge Deller:
"Silence build error in au1100fb driver found by kernel test robot"
* tag 'fbdev-for-7.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
fbdev: au1100fb: Fix build on MIPS64
sysutils/whowatch: Update 1.4 => 1.8.6.2, take maintainership
Switch to upstream with FreeBSD support:
- https://github.com/Zedai00/whowatch/
- The new update wasn't working on FreeBSD due to Linuxisms and FreeBSD
wrong API usages.
- Overhauled the codebase in a fork and updated it to work on both
Linux and FreeBSD.
- Uses of sysctl, libprocstat, kvm etc to gather the system informations.
PR: 293113
MFH: 2026Q1
Co-authored-by: Vladimir Druzenko <vvd at FreeBSD.org>
(cherry picked from commit 55476368ccbc3863cec96779d914046a39ac5299)
sysutils/whowatch: Update 1.4 => 1.8.6.2, take maintainership
Switch to upstream with FreeBSD support:
- The new update wasn't working on FreeBSD due to Linuxisms and FreeBSD
wrong API usages.
- Overhauled the codebase in a fork and updated it to work on both
Linux and FreeBSD.
- Uses of sysctl, libprocstat, kvm etc to gather the system informations.
PR: 293113
MFH: 2026Q1
Co-authored-by: Vladimir Druzenko <vvd at FreeBSD.org>
sun4v: hook up trap 0x30 (data_access_exception in the UA2005 spec) properly so the generic slowtrap/trap code path is not used, but the sun4v_datatrap code path is used instead
